/**
 *
 * jquery.sparkline.js
 *
 * v2.1.2
 * (c) Splunk, Inc
 * Contact: Gareth Watts (gareth@splunk.com)
 * http://omnipotent.net/jquery.sparkline/
 *
 * Generates inline sparkline charts from data supplied either to the method
 * or inline in HTML
 *
 * Compatible with Internet Explorer 6.0+ and modern browsers equipped with the canvas tag
 * (Firefox 2.0+, Safari, Opera, etc)
 *
 * License: New BSD License
 *
 * Copyright (c) 2012, Splunk Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice,
 *       this list of conditions and the following disclaimer in the documentation
 *       and/or other materials provided with the distribution.
 *     * Neither the name of Splunk Inc nor the names of its contributors may
 *       be used to endorse or promote products derived from this software without
 *       specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * Usage:
 *  $(selector).sparkline(values, options)
 *
 * If values is undefined or set to 'html' then the data values are read from the specified tag:
 *   <p>Sparkline: <span class="sparkline">1,4,6,6,8,5,3,5</span></p>
 *   $('.sparkline').sparkline();
 * There must be no spaces in the enclosed data set
 *
 * Otherwise values must be an array of numbers or null values
 *    <p>Sparkline: <span id="sparkline1">This text replaced if the browser is compatible</span></p>
 *    $('#sparkline1').sparkline([1,4,6,6,8,5,3,5])
 *    $('#sparkline2').sparkline([1,4,6,null,null,5,3,5])
 *
 * Values can also be specified in an HTML comment, or as a values attribute:
 *    <p>Sparkline: <span class="sparkline"><!--1,4,6,6,8,5,3,5 --></span></p>
 *    <p>Sparkline: <span class="sparkline" values="1,4,6,6,8,5,3,5"></span></p>
 *    $('.sparkline').sparkline();
 *
 * For line charts, x values can also be specified:
 *   <p>Sparkline: <span class="sparkline">1:1,2.7:4,3.4:6,5:6,6:8,8.7:5,9:3,10:5</span></p>
 *    $('#sparkline1').sparkline([ [1,1], [2.7,4], [3.4,6], [5,6], [6,8], [8.7,5], [9,3], [10,5] ])
 *
 * By default, options should be passed in as teh second argument to the sparkline function:
 *   $('.sparkline').sparkline([1,2,3,4], {type: 'bar'})
 *
 * Options can also be set by passing them on the tag itself.  This feature is disabled by default though
 * as there's a slight performance overhead:
 *   $('.sparkline').sparkline([1,2,3,4], {enableTagOptions: true})
 *   <p>Sparkline: <span class="sparkline" sparkType="bar" sparkBarColor="red">loading</span></p>
 * Prefix all options supplied as tag attribute with "spark" (configurable by setting tagOptionPrefix)
 *
 * Supported options:
 *   lineColor - Color of the line used for the chart
 *   fillColor - Color used to fill in the chart - Set to '' or false for a transparent chart
 *   width - Width of the chart - Defaults to 3 times the number of values in pixels
 *   height - Height of the chart - Defaults to the height of the containing element
 *   chartRangeMin - Specify the minimum value to use for the Y range of the chart - Defaults to the minimum value supplied
 *   chartRangeMax - Specify the maximum value to use for the Y range of the chart - Defaults to the maximum value supplied
 *   chartRangeClip - Clip out of range values to the max/min specified by chartRangeMin and chartRangeMax
 *   chartRangeMinX - Specify the minimum value to use for the X range of the chart - Defaults to the minimum value supplied
 *   chartRangeMaxX - Specify the maximum value to use for the X range of the chart - Defaults to the maximum value supplied
 *   composite - If true then don't erase any existing chart attached to the tag, but draw
 *           another chart over the top - Note that width and height are ignored if an
 *           existing chart is detected.
 *   tagValuesAttribute - Name of tag attribute to check for data values - Defaults to 'values'
 *   enableTagOptions - Whether to check tags for sparkline options
 *   tagOptionPrefix - Prefix used for options supplied as tag attributes - Defaults to 'spark'
 *   disableHiddenCheck - If set to true, then the plugin will assume that charts will never be drawn into a
 *           hidden dom element, avoding a browser reflow
 *   disableInteraction - If set to true then all mouseover/click interaction behaviour will be disabled,
 *       making the plugin perform much like it did in 1.x
 *   disableTooltips - If set to true then tooltips will be disabled - Defaults to false (tooltips enabled)
 *   disableHighlight - If set to true then highlighting of selected chart elements on mouseover will be disabled
 *       defaults to false (highlights enabled)
 *   highlightLighten - Factor to lighten/darken highlighted chart values by - Defaults to 1.4 for a 40% increase
 *   tooltipContainer - Specify which DOM element the tooltip should be rendered into - defaults to document.body
 *   tooltipClassname - Optional CSS classname to apply to tooltips - If not specified then a default style will be applied
 *   tooltipOffsetX - How many pixels away from the mouse pointer to render the tooltip on the X axis
 *   tooltipOffsetY - How many pixels away from the mouse pointer to render the tooltip on the r axis
 *   tooltipFormatter  - Optional callback that allows you to override the HTML displayed in the tooltip
 *       callback is given arguments of (sparkline, options, fields)
 *   tooltipChartTitle - If specified then the tooltip uses the string specified by this setting as a title
 *   tooltipFormat - A format string or SPFormat object  (or an array thereof for multiple entries)
 *       to control the format of the tooltip
 *   tooltipPrefix - A string to prepend to each field displayed in a tooltip
 *   tooltipSuffix - A string to append to each field displayed in a tooltip
 *   tooltipSkipNull - If true then null values will not have a tooltip displayed (defaults to true)
 *   tooltipValueLookups - An object or range map to map field values to tooltip strings
 *       (eg. to map -1 to "Lost", 0 to "Draw", and 1 to "Win")
 *   numberFormatter - Optional callback for formatting numbers in tooltips
 *   numberDigitGroupSep - Character to use for group separator in numbers "1,234" - Defaults to ","
 *   numberDecimalMark - Character to use for the decimal point when formatting numbers - Defaults to "."
 *   numberDigitGroupCount - Number of digits between group separator - Defaults to 3
 *
 * There are 7 types of sparkline, selected by supplying a "type" option of 'line' (default),
 * 'bar', 'tristate', 'bullet', 'discrete', 'pie' or 'box'
 *    line - Line chart.  Options:
 *       spotColor - Set to '' to not end each line in a circular spot
 *       minSpotColor - If set, color of spot at minimum value
 *       maxSpotColor - If set, color of spot at maximum value
 *       spotRadius - Radius in pixels
 *       lineWidth - Width of line in pixels
 *       normalRangeMin
 *       normalRangeMax - If set draws a filled horizontal bar between these two values marking the "normal"
 *                      or expected range of values
 *       normalRangeColor - Color to use for the above bar
 *       drawNormalOnTop - Draw the normal range above the chart fill color if true
 *       defaultPixelsPerValue - Defaults to 3 pixels of width for each value in the chart
 *       highlightSpotColor - The color to use for drawing a highlight spot on mouseover - Set to null to disable
 *       highlightLineColor - The color to use for drawing a highlight line on mouseover - Set to null to disable
 *       valueSpots - Specify which points to draw spots on, and in which color.  Accepts a range map
 *
 *   bar - Bar chart.  Options:
 *       barColor - Color of bars for postive values
 *       negBarColor - Color of bars for negative values
 *       zeroColor - Color of bars with zero values
 *       nullColor - Color of bars with null values - Defaults to omitting the bar entirely
 *       barWidth - Width of bars in pixels
 *       colorMap - Optional mappnig of values to colors to override the *BarColor values above
 *                  can be an Array of values to control the color of individual bars or a range map
 *                  to specify colors for individual ranges of values
 *       barSpacing - Gap between bars in pixels
 *       zeroAxis - Centers the y-axis around zero if true
 *
 *   tristate - Charts values of win (>0), lose (<0) or draw (=0)
 *       posBarColor - Color of win values
 *       negBarColor - Color of lose values
 *       zeroBarColor - Color of draw values
 *       barWidth - Width of bars in pixels
 *       barSpacing - Gap between bars in pixels
 *       colorMap - Optional mappnig of values to colors to override the *BarColor values above
 *                  can be an Array of values to control the color of individual bars or a range map
 *                  to specify colors for individual ranges of values
 *
 *   discrete - Options:
 *       lineHeight - Height of each line in pixels - Defaults to 30% of the graph height
 *       thesholdValue - Values less than this value will be drawn using thresholdColor instead of lineColor
 *       thresholdColor
 *
 *   bullet - Values for bullet graphs msut be in the order: target, performance, range1, range2, range3, ...
 *       options:
 *       targetColor - The color of the vertical target marker
 *       targetWidth - The width of the target marker in pixels
 *       performanceColor - The color of the performance measure horizontal bar
 *       rangeColors - Colors to use for each qualitative range background color
 *
 *   pie - Pie chart. Options:
 *       sliceColors - An array of colors to use for pie slices
 *       offset - Angle in degrees to offset the first slice - Try -90 or +90
 *       borderWidth - Width of border to draw around the pie chart, in pixels - Defaults to 0 (no border)
 *       borderColor - Color to use for the pie chart border - Defaults to #000
 *
 *   box - Box plot. Options:
 *       raw - Set to true to supply pre-computed plot points as values
 *             values should be: low_outlier, low_whisker, q1, median, q3, high_whisker, high_outlier
 *             When set to false you can supply any number of values and the box plot will
 *             be computed for you.  Default is false.
 *       showOutliers - Set to true (default) to display outliers as circles
 *       outlierIQR - Interquartile range used to determine outliers.  Default 1.5
 *       boxLineColor - Outline color of the box
 *       boxFillColor - Fill color for the box
 *       whiskerColor - Line color used for whiskers
 *       outlierLineColor - Outline color of outlier circles
 *       outlierFillColor - Fill color of the outlier circles
 *       spotRadius - Radius of outlier circles
 *       medianColor - Line color of the median line
 *       target - Draw a target cross hair at the supplied value (default undefined)
 *
 *
 *
 *   Examples:
 *   $('#sparkline1').sparkline(myvalues, { lineColor: '#f00', fillColor: false });
 *   $('.barsparks').sparkline('html', { type:'bar', height:'40px', barWidth:5 });
 *   $('#tristate').sparkline([1,1,-1,1,0,0,-1], { type:'tristate' }):
 *   $('#discrete').sparkline([1,3,4,5,5,3,4,5], { type:'discrete' });
 *   $('#bullet').sparkline([10,12,12,9,7], { type:'bullet' });
 *   $('#pie').sparkline([1,1,2], { type:'pie' });
 */

/*jslint regexp: true, browser: true, jquery: true, white: true, nomen: false, plusplus: false, maxerr: 500, indent: 4 */

(function (document, Math, undefined) { // performance/minified-size optimization
    (function (factory) {
        if (typeof define === 'function' && define.amd) {
            define(['jquery'], factory);
        } else if (jQuery && !jQuery.fn.sparkline) {
            factory(jQuery);
        }
    }
    (function ($) {
        'use strict';

        var UNSET_OPTION = {},
            getDefaults, createClass, SPFormat, clipval, quartile, normalizeValue, normalizeValues,
            remove, isNumber, all, sum, addCSS, ensureArray, formatNumber, RangeMap,
            MouseHandler, Tooltip, barHighlightMixin,
            line, bar, tristate, discrete, bullet, pie, box, defaultStyles, initStyles,
            VShape, VCanvas_base, VCanvas_canvas, VCanvas_vml, pending, shapeCount = 0;

        /**
         * Default configuration settings
         */
        getDefaults = function () {
            return {
                // Settings common to most/all chart types
                common: {
                    type: 'line',
                    lineColor: '#00f',
                    fillColor: '#cdf',
                    defaultPixelsPerValue: 3,
                    width: 'auto',
                    height: 'auto',
                    composite: false,
                    tagValuesAttribute: 'values',
                    tagOptionsPrefix: 'spark',
                    enableTagOptions: false,
                    enableHighlight: true,
                    highlightLighten: 1.4,
                    tooltipSkipNull: true,
                    tooltipPrefix: '',
                    tooltipSuffix: '',
                    disableHiddenCheck: false,
                    numberFormatter: false,
                    numberDigitGroupCount: 3,
                    numberDigitGroupSep: ',',
                    numberDecimalMark: '.',
                    disableTooltips: false,
                    disableInteraction: false
                },
                // Defaults for line charts
                line: {
                    spotColor: '#f80',
                    highlightSpotColor: '#5f5',
                    highlightLineColor: '#f22',
                    spotRadius: 1.5,
                    minSpotColor: '#f80',
                    maxSpotColor: '#f80',
                    lineWidth: 1,
                    normalRangeMin: undefined,
                    normalRangeMax: undefined,
                    normalRangeColor: '#ccc',
                    drawNormalOnTop: false,
                    chartRangeMin: undefined,
                    chartRangeMax: undefined,
                    chartRangeMinX: undefined,
                    chartRangeMaxX: undefined,
                    tooltipFormat: new SPFormat('<span style="color: {{color}}">&#9679;</span> {{prefix}}{{y}}{{suffix}}')
                },
                // Defaults for bar charts
                bar: {
                    barColor: '#3366cc',
                    negBarColor: '#f44',
                    stackedBarColor: ['#3366cc', '#dc3912', '#ff9900', '#109618', '#66aa00',
                        '#dd4477', '#0099c6', '#990099'],
                    zeroColor: undefined,
                    nullColor: undefined,
                    zeroAxis: true,
                    barWidth: 4,
                    barSpacing: 1,
                    chartRangeMax: undefined,
                    chartRangeMin: undefined,
                    chartRangeClip: false,
                    colorMap: undefined,
                    tooltipFormat: new SPFormat('<span style="color: {{color}}">&#9679;</span> {{prefix}}{{value}}{{suffix}}')
                },
                // Defaults for tristate charts
                tristate: {
                    barWidth: 4,
                    barSpacing: 1,
                    posBarColor: '#6f6',
                    negBarColor: '#f44',
                    zeroBarColor: '#999',
                    colorMap: {},
                    tooltipFormat: new SPFormat('<span style="color: {{color}}">&#9679;</span> {{value:map}}'),
                    tooltipValueLookups: {map: {'-1': 'Loss', '0': 'Draw', '1': 'Win'}}
                },
                // Defaults for discrete charts
                discrete: {
                    lineHeight: 'auto',
                    thresholdColor: undefined,
                    thresholdValue: 0,
                    chartRangeMax: undefined,
                    chartRangeMin: undefined,
                    chartRangeClip: false,
                    tooltipFormat: new SPFormat('{{prefix}}{{value}}{{suffix}}')
                },
                // Defaults for bullet charts
                bullet: {
                    targetColor: '#f33',
                    targetWidth: 3, // width of the target bar in pixels
                    performanceColor: '#33f',
                    rangeColors: ['#d3dafe', '#a8b6ff', '#7f94ff'],
                    base: undefined, // set this to a number to change the base start number
                    tooltipFormat: new SPFormat('{{fieldkey:fields}} - {{value}}'),
                    tooltipValueLookups: {fields: {r: 'Range', p: 'Performance', t: 'Target'}}
                },
                // Defaults for pie charts
                pie: {
                    offset: 0,
                    sliceColors: ['#3366cc', '#dc3912', '#ff9900', '#109618', '#66aa00',
                        '#dd4477', '#0099c6', '#990099'],
                    borderWidth: 0,
                    borderColor: '#000',
                    tooltipFormat: new SPFormat('<span style="color: {{color}}">&#9679;</span> {{value}} ({{percent.1}}%)')
                },
                // Defaults for box plots
                box: {
                    raw: false,
                    boxLineColor: '#000',
                    boxFillColor: '#cdf',
                    whiskerColor: '#000',
                    outlierLineColor: '#333',
                    outlierFillColor: '#fff',
                    medianColor: '#f00',
                    showOutliers: true,
                    outlierIQR: 1.5,
                    spotRadius: 1.5,
                    target: undefined,
                    targetColor: '#4a2',
                    chartRangeMax: undefined,
                    chartRangeMin: undefined,
                    tooltipFormat: new SPFormat('{{field:fields}}: {{value}}'),
                    tooltipFormatFieldlistKey: 'field',
                    tooltipValueLookups: {
                        fields: {
                            lq: 'Lower Quartile', med: 'Median',
                            uq: 'Upper Quartile', lo: 'Left Outlier', ro: 'Right Outlier',
                            lw: 'Left Whisker', rw: 'Right Whisker'
                        }
                    }
                }
            };
        };

        // You can have tooltips use a css class other than jqstooltip by specifying tooltipClassname
        defaultStyles = '.jqstooltip { ' +
            'position: absolute;' +
            'left: 0px;' +
            'top: 0px;' +
            'visibility: hidden;' +
            'background: rgb(0, 0, 0) transparent;' +
            'background-color: rgba(0,0,0,0.6);' +
            'filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000);' +
            '-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)";' +
            'color: white;' +
            'font: 10px arial, san serif;' +
            'text-align: left;' +
            'white-space: nowrap;' +
            'padding: 5px;' +
            'border: 1px solid white;' +
            'z-index: 10000;' +
            '}' +
            '.jqsfield { ' +
            'color: white;' +
            'font: 10px arial, san serif;' +
            'text-align: left;' +
            '}';

        /**
         * Utilities
         */

        createClass = function (/* [baseclass, [mixin, ...]], definition */) {
            var Class, args;
            Class = function () {
                this.init.apply(this, arguments);
            };
            if (arguments.length > 1) {
                if (arguments[0]) {
                    Class.prototype = $.extend(new arguments[0](), arguments[arguments.length - 1]);
                    Class._super = arguments[0].prototype;
                } else {
                    Class.prototype = arguments[arguments.length - 1];
                }
                if (arguments.length > 2) {
                    args = Array.prototype.slice.call(arguments, 1, -1);
                    args.unshift(Class.prototype);
                    $.extend.apply($, args);
                }
            } else {
                Class.prototype = arguments[0];
            }
            Class.prototype.cls = Class;
            return Class;
        };

        /**
         * Wraps a format string for tooltips
         * {{x}}
         * {{x.2}
     * {{x:months}}
     */
        $.SPFormatClass = SPFormat = createClass({
            fre: /\{\{([\w.]+?)(:(.+?))?\}\}/g,
            precre: /(\w+)\.(\d+)/,

            init: function (format, fclass) {
                this.format = format;
                this.fclass = fclass;
            },

            render: function (fieldset, lookups, options) {
                var self = this,
                    fields = fieldset,
                    match, token, lookupkey, fieldvalue, prec;
                return this.format.replace(this.fre, function () {
                    var lookup;
                    token = arguments[1];
                    lookupkey = arguments[3];
                    match = self.precre.exec(token);
                    if (match) {
                        prec = match[2];
                        token = match[1];
                    } else {
                        prec = false;
                    }
                    fieldvalue = fields[token];
                    if (fieldvalue === undefined) {
                        return '';
                    }
                    if (lookupkey && lookups && lookups[lookupkey]) {
                        lookup = lookups[lookupkey];
                        if (lookup.get) { // RangeMap
                            return lookups[lookupkey].get(fieldvalue) || fieldvalue;
                        } else {
                            return lookups[lookupkey][fieldvalue] || fieldvalue;
                        }
                    }
                    if (isNumber(fieldvalue)) {
                        if (options.get('numberFormatter')) {
                            fieldvalue = options.get('numberFormatter')(fieldvalue);
                        } else {
                            fieldvalue = formatNumber(fieldvalue, prec,
                                options.get('numberDigitGroupCount'),
                                options.get('numberDigitGroupSep'),
                                options.get('numberDecimalMark'));
                        }
                    }
                    return fieldvalue;
                });
            }
        });

        // convience method to avoid needing the new operator
        $.spformat = function (format, fclass) {
            return new SPFormat(format, fclass);
        };

        clipval = function (val, min, max) {
            if (val < min) {
                return min;
            }
            if (val > max) {
                return max;
            }
            return val;
        };

        quartile = function (values, q) {
            var vl;
            if (q === 2) {
                vl = Math.floor(values.length / 2);
                return values.length % 2 ? values[vl] : (values[vl - 1] + values[vl]) / 2;
            } else {
                if (values.length % 2) { // odd
                    vl = (values.length * q + q) / 4;
                    return vl % 1 ? (values[Math.floor(vl)] + values[Math.floor(vl) - 1]) / 2 : values[vl - 1];
                } else { //even
                    vl = (values.length * q + 2) / 4;
                    return vl % 1 ? (values[Math.floor(vl)] + values[Math.floor(vl) - 1]) / 2 : values[vl - 1];

                }
            }
        };

        normalizeValue = function (val) {
            var nf;
            switch (val) {
                case 'undefined':
                    val = undefined;
                    break;
                case 'null':
                    val = null;
                    break;
                case 'true':
                    val = true;
                    break;
                case 'false':
                    val = false;
                    break;
                default:
                    nf = parseFloat(val);
                    if (val == nf) {
                        val = nf;
                    }
            }
            return val;
        };

        normalizeValues = function (vals) {
            var i, result = [];
            for (i = vals.length; i--;) {
                result[i] = normalizeValue(vals[i]);
            }
            return result;
        };

        remove = function (vals, filter) {
            var i, vl, result = [];
            for (i = 0, vl = vals.length; i < vl; i++) {
                if (vals[i] !== filter) {
                    result.push(vals[i]);
                }
            }
            return result;
        };

        isNumber = function (num) {
            return !isNaN(parseFloat(num)) && isFinite(num);
        };

        formatNumber = function (num, prec, groupsize, groupsep, decsep) {
            var p, i;
            num = (prec === false ? parseFloat(num).toString() : num.toFixed(prec)).split('');
            p = (p = $.inArray('.', num)) < 0 ? num.length : p;
            if (p < num.length) {
                num[p] = decsep;
            }
            for (i = p - groupsize; i > 0; i -= groupsize) {
                num.splice(i, 0, groupsep);
            }
            return num.join('');
        };

        // determine if all values of an array match a value
        // returns true if the array is empty
        all = function (val, arr, ignoreNull) {
            var i;
            for (i = arr.length; i--;) {
                if (ignoreNull && arr[i] === null) continue;
                if (arr[i] !== val) {
                    return false;
                }
            }
            return true;
        };

        // sums the numeric values in an array, ignoring other values
        sum = function (vals) {
            var total = 0, i;
            for (i = vals.length; i--;) {
                total += typeof vals[i] === 'number' ? vals[i] : 0;
            }
            return total;
        };

        ensureArray = function (val) {
            return $.isArray(val) ? val : [val];
        };

        // http://paulirish.com/2008/bookmarklet-inject-new-css-rules/
        addCSS = function (css) {
            var tag;
            //if ('\v' == 'v') /* ie only */ {
            if (document.createStyleSheet) {
                document.createStyleSheet().cssText = css;
            } else {
                tag = document.createElement('style');
                tag.type = 'text/css';
                document.getElementsByTagName('head')[0].appendChild(tag);
                tag[(typeof document.body.style.WebkitAppearance == 'string') /* webkit only */ ? 'innerText' : 'innerHTML'] = css;
            }
        };

        // Provide a cross-browser interface to a few simple drawing primitives
        $.fn.simpledraw = function (width, height, useExisting, interact) {
            var target, mhandler;
            if (useExisting && (target = this.data('_jqs_vcanvas'))) {
                return target;
            }

            if ($.fn.sparkline.canvas === false) {
                // We've already determined that neither Canvas nor VML are available
                return false;

            } else if ($.fn.sparkline.canvas === undefined) {
                // No function defined yet -- need to see if we support Canvas or VML
                var el = document.createElement('canvas');
                if (!!(el.getContext && el.getContext('2d'))) {
                    // Canvas is available
                    $.fn.sparkline.canvas = function (width, height, target, interact) {
                        return new VCanvas_canvas(width, height, target, interact);
                    };
                } else if (document.namespaces && !document.namespaces.v) {
                    // VML is available
                    document.namespaces.add('v', 'urn:schemas-microsoft-com:vml', '#default#VML');
                    $.fn.sparkline.canvas = function (width, height, target, interact) {
                        return new VCanvas_vml(width, height, target);
                    };
                } else {
                    // Neither Canvas nor VML are available
                    $.fn.sparkline.canvas = false;
                    return false;
                }
            }

            if (width === undefined) {
                width = $(this).innerWidth();
            }
            if (height === undefined) {
                height = $(this).innerHeight();
            }

            target = $.fn.sparkline.canvas(width, height, this, interact);

            mhandler = $(this).data('_jqs_mhandler');
            if (mhandler) {
                mhandler.registerCanvas(target);
            }
            return target;
        };

        $.fn.cleardraw = function () {
            var target = this.data('_jqs_vcanvas');
            if (target) {
                target.reset();
            }
        };

        $.RangeMapClass = RangeMap = createClass({
            init: function (map) {
                var key, range, rangelist = [];
                for (key in map) {
                    if (map.hasOwnProperty(key) && typeof key === 'string' && key.indexOf(':') > -1) {
                        range = key.split(':');
                        range[0] = range[0].length === 0 ? -Infinity : parseFloat(range[0]);
                        range[1] = range[1].length === 0 ? Infinity : parseFloat(range[1]);
                        range[2] = map[key];
                        rangelist.push(range);
                    }
                }
                this.map = map;
                this.rangelist = rangelist || false;
            },

            get: function (value) {
                var rangelist = this.rangelist,
                    i, range, result;
                if ((result = this.map[value]) !== undefined) {
                    return result;
                }
                if (rangelist) {
                    for (i = rangelist.length; i--;) {
                        range = rangelist[i];
                        if (range[0] <= value && range[1] >= value) {
                            return range[2];
                        }
                    }
                }
                return undefined;
            }
        });

        // Convenience function
        $.range_map = function (map) {
            return new RangeMap(map);
        };

        MouseHandler = createClass({
            init: function (el, options) {
                var $el = $(el);
                this.$el = $el;
                this.options = options;
                this.currentPageX = 0;
                this.currentPageY = 0;
                this.el = el;
                this.splist = [];
                this.tooltip = null;
                this.over = false;
                this.displayTooltips = !options.get('disableTooltips');
                this.highlightEnabled = !options.get('disableHighlight');
            },

            registerSparkline: function (sp) {
                this.splist.push(sp);
                if (this.over) {
                    this.updateDisplay();
                }
            },

            registerCanvas: function (canvas) {
                var $canvas = $(canvas.canvas);
                this.canvas = canvas;
                this.$canvas = $canvas;
                $canvas.mouseenter($.proxy(this.mouseenter, this));
                $canvas.mouseleave($.proxy(this.mouseleave, this));
                $canvas.click($.proxy(this.mouseclick, this));
            },

            reset: function (removeTooltip) {
                this.splist = [];
                if (this.tooltip && removeTooltip) {
                    this.tooltip.remove();
                    this.tooltip = undefined;
                }
            },

            mouseclick: function (e) {
                var clickEvent = $.Event('sparklineClick');
                clickEvent.originalEvent = e;
                clickEvent.sparklines = this.splist;
                this.$el.trigger(clickEvent);
            },

            mouseenter: function (e) {
                $(document.body).unbind('mousemove.jqs');
                $(document.body).bind('mousemove.jqs', $.proxy(this.mousemove, this));
                this.over = true;
                this.currentPageX = e.pageX;
                this.currentPageY = e.pageY;
                this.currentEl = e.target;
                if (!this.tooltip && this.displayTooltips) {
                    this.tooltip = new Tooltip(this.options);
                    this.tooltip.updatePosition(e.pageX, e.pageY);
                }
                this.updateDisplay();
            },

            mouseleave: function () {
                $(document.body).unbind('mousemove.jqs');
                var splist = this.splist,
                    spcount = splist.length,
                    needsRefresh = false,
                    sp, i;
                this.over = false;
                this.currentEl = null;

                if (this.tooltip) {
                    this.tooltip.remove();
                    this.tooltip = null;
                }

                for (i = 0; i < spcount; i++) {
                    sp = splist[i];
                    if (sp.clearRegionHighlight()) {
                        needsRefresh = true;
                    }
                }

                if (needsRefresh) {
                    this.canvas.render();
                }
            },

            mousemove: function (e) {
                this.currentPageX = e.pageX;
                this.currentPageY = e.pageY;
                this.currentEl = e.target;
                if (this.tooltip) {
                    this.tooltip.updatePosition(e.pageX, e.pageY);
                }
                this.updateDisplay();
            },

            updateDisplay: function () {
                var splist = this.splist,
                    spcount = splist.length,
                    needsRefresh = false,
                    offset = this.$canvas.offset(),
                    localX = this.currentPageX - offset.left,
                    localY = this.currentPageY - offset.top,
                    tooltiphtml, sp, i, result, changeEvent;
                if (!this.over) {
                    return;
                }
                for (i = 0; i < spcount; i++) {
                    sp = splist[i];
                    result = sp.setRegionHighlight(this.currentEl, localX, localY);
                    if (result) {
                        needsRefresh = true;
                    }
                }
                if (needsRefresh) {
                    changeEvent = $.Event('sparklineRegionChange');
                    changeEvent.sparklines = this.splist;
                    this.$el.trigger(changeEvent);
                    if (this.tooltip) {
                        tooltiphtml = '';
                        for (i = 0; i < spcount; i++) {
                            sp = splist[i];
                            tooltiphtml += sp.getCurrentRegionTooltip();
                        }
                        this.tooltip.setContent(tooltiphtml);
                    }
                    if (!this.disableHighlight) {
                        this.canvas.render();
                    }
                }
                if (result === null) {
                    this.mouseleave();
                }
            }
        });


        Tooltip = createClass({
            sizeStyle: 'position: static !important;' +
            'display: block !important;' +
            'visibility: hidden !important;' +
            'float: left !important;',

            init: function (options) {
                var tooltipClassname = options.get('tooltipClassname', 'jqstooltip'),
                    sizetipStyle = this.sizeStyle,
                    offset;
                this.container = options.get('tooltipContainer') || document.body;
                this.tooltipOffsetX = options.get('tooltipOffsetX', 10);
                this.tooltipOffsetY = options.get('tooltipOffsetY', 12);
                // remove any previous lingering tooltip
                $('#jqssizetip').remove();
                $('#jqstooltip').remove();
                this.sizetip = $('<div/>', {
                    id: 'jqssizetip',
                    style: sizetipStyle,
                    'class': tooltipClassname
                });
                this.tooltip = $('<div/>', {
                    id: 'jqstooltip',
                    'class': tooltipClassname
                }).appendTo(this.container);
                // account for the container's location
                offset = this.tooltip.offset();
                this.offsetLeft = offset.left;
                this.offsetTop = offset.top;
                this.hidden = true;
                $(window).unbind('resize.jqs scroll.jqs');
                $(window).bind('resize.jqs scroll.jqs', $.proxy(this.updateWindowDims, this));
                this.updateWindowDims();
            },

            updateWindowDims: function () {
                this.scrollTop = $(window).scrollTop();
                this.scrollLeft = $(window).scrollLeft();
                this.scrollRight = this.scrollLeft + $(window).width();
                this.updatePosition();
            },

            getSize: function (content) {
                this.sizetip.html(content).appendTo(this.container);
                this.width = this.sizetip.width() + 1;
                this.height = this.sizetip.height();
                this.sizetip.remove();
            },

            setContent: function (content) {
                if (!content) {
                    this.tooltip.css('visibility', 'hidden');
                    this.hidden = true;
                    return;
                }
                this.getSize(content);
                this.tooltip.html(content)
                    .css({
                        'width': this.width,
                        'height': this.height,
                        'visibility': 'visible'
                    });
                if (this.hidden) {
                    this.hidden = false;
                    this.updatePosition();
                }
            },

            updatePosition: function (x, y) {
                if (x === undefined) {
                    if (this.mousex === undefined) {
                        return;
                    }
                    x = this.mousex - this.offsetLeft;
                    y = this.mousey - this.offsetTop;

                } else {
                    this.mousex = x = x - this.offsetLeft;
                    this.mousey = y = y - this.offsetTop;
                }
                if (!this.height || !this.width || this.hidden) {
                    return;
                }

                y -= this.height + this.tooltipOffsetY;
                x += this.tooltipOffsetX;

                if (y < this.scrollTop) {
                    y = this.scrollTop;
                }
                if (x < this.scrollLeft) {
                    x = this.scrollLeft;
                } else if (x + this.width > this.scrollRight) {
                    x = this.scrollRight - this.width;
                }

                this.tooltip.css({
                    'left': x,
                    'top': y
                });
            },

            remove: function () {
                this.tooltip.remove();
                this.sizetip.remove();
                this.sizetip = this.tooltip = undefined;
                $(window).unbind('resize.jqs scroll.jqs');
            }
        });

        initStyles = function () {
            addCSS(defaultStyles);
        };

        $(initStyles);

        pending = [];
        $.fn.sparkline = function (userValues, userOptions) {
            return this.each(function () {
                var options = new $.fn.sparkline.options(this, userOptions),
                    $this = $(this),
                    render, i;
                render = function () {
                    var values, width, height, tmp, mhandler, sp, vals;
                    if (userValues === 'html' || userValues === undefined) {
                        vals = this.getAttribute(options.get('tagValuesAttribute'));
                        if (vals === undefined || vals === null) {
                            vals = $this.html();
                        }
                        values = vals.replace(/(^\s*<!--)|(-->\s*$)|\s+/g, '').split(',');
                    } else {
                        values = userValues;
                    }

                    width = options.get('width') === 'auto' ? values.length * options.get('defaultPixelsPerValue') : options.get('width');
                    if (options.get('height') === 'auto') {
                        if (!options.get('composite') || !$.data(this, '_jqs_vcanvas')) {
                            // must be a better way to get the line height
                            tmp = document.createElement('span');
                            tmp.innerHTML = 'a';
                            $this.html(tmp);
                            height = $(tmp).innerHeight() || $(tmp).height();
                            $(tmp).remove();
                            tmp = null;
                        }
                    } else {
                        height = options.get('height');
                    }

                    if (!options.get('disableInteraction')) {
                        mhandler = $.data(this, '_jqs_mhandler');
                        if (!mhandler) {
                            mhandler = new MouseHandler(this, options);
                            $.data(this, '_jqs_mhandler', mhandler);
                        } else if (!options.get('composite')) {
                            mhandler.reset();
                        }
                    } else {
                        mhandler = false;
                    }

                    if (options.get('composite') && !$.data(this, '_jqs_vcanvas')) {
                        if (!$.data(this, '_jqs_errnotify')) {
                            alert('Attempted to attach a composite sparkline to an element with no existing sparkline');
                            $.data(this, '_jqs_errnotify', true);
                        }
                        return;
                    }

                    sp = new $.fn.sparkline[options.get('type')](this, values, options, width, height);

                    sp.render();

                    if (mhandler) {
                        mhandler.registerSparkline(sp);
                    }
                };
                if (($(this).html() && !options.get('disableHiddenCheck') && $(this).is(':hidden')) || !$(this).parents('body').length) {
                    if (!options.get('composite') && $.data(this, '_jqs_pending')) {
                        // remove any existing references to the element
                        for (i = pending.length; i; i--) {
                            if (pending[i - 1][0] == this) {
                                pending.splice(i - 1, 1);
                            }
                        }
                    }
                    pending.push([this, render]);
                    $.data(this, '_jqs_pending', true);
                } else {
                    render.call(this);
                }
            });
        };

        $.fn.sparkline.defaults = getDefaults();


        $.sparkline_display_visible = function () {
            var el, i, pl;
            var done = [];
            for (i = 0, pl = pending.length; i < pl; i++) {
                el = pending[i][0];
                if ($(el).is(':visible') && !$(el).parents().is(':hidden')) {
                    pending[i][1].call(el);
                    $.data(pending[i][0], '_jqs_pending', false);
                    done.push(i);
                } else if (!$(el).closest('html').length && !$.data(el, '_jqs_pending')) {
                    // element has been inserted and removed from the DOM
                    // If it was not yet inserted into the dom then the .data request
                    // will return true.
                    // removing from the dom causes the data to be removed.
                    $.data(pending[i][0], '_jqs_pending', false);
                    done.push(i);
                }
            }
            for (i = done.length; i; i--) {
                pending.splice(done[i - 1], 1);
            }
        };


        /**
         * User option handler
         */
        $.fn.sparkline.options = createClass({
            init: function (tag, userOptions) {
                var extendedOptions, defaults, base, tagOptionType;
                this.userOptions = userOptions = userOptions || {};
                this.tag = tag;
                this.tagValCache = {};
                defaults = $.fn.sparkline.defaults;
                base = defaults.common;
                this.tagOptionsPrefix = userOptions.enableTagOptions && (userOptions.tagOptionsPrefix || base.tagOptionsPrefix);

                tagOptionType = this.getTagSetting('type');
                if (tagOptionType === UNSET_OPTION) {
                    extendedOptions = defaults[userOptions.type || base.type];
                } else {
                    extendedOptions = defaults[tagOptionType];
                }
                this.mergedOptions = $.extend({}, base, extendedOptions, userOptions);
            },


            getTagSetting: function (key) {
                var prefix = this.tagOptionsPrefix,
                    val, i, pairs, keyval;
                if (prefix === false || prefix === undefined) {
                    return UNSET_OPTION;
                }
                if (this.tagValCache.hasOwnProperty(key)) {
                    val = this.tagValCache.key;
                } else {
                    val = this.tag.getAttribute(prefix + key);
                    if (val === undefined || val === null) {
                        val = UNSET_OPTION;
                    } else if (val.substr(0, 1) === '[') {
                        val = val.substr(1, val.length - 2).split(',');
                        for (i = val.length; i--;) {
                            val[i] = normalizeValue(val[i].replace(/(^\s*)|(\s*$)/g, ''));
                        }
                    } else if (val.substr(0, 1) === '{') {
                        pairs = val.substr(1, val.length - 2).split(',');
                        val = {};
                        for (i = pairs.length; i--;) {
                            keyval = pairs[i].split(':', 2);
                            val[keyval[0].replace(/(^\s*)|(\s*$)/g, '')] = normalizeValue(keyval[1].replace(/(^\s*)|(\s*$)/g, ''));
                        }
                    } else {
                        val = normalizeValue(val);
                    }
                    this.tagValCache.key = val;
                }
                return val;
            },

            get: function (key, defaultval) {
                var tagOption = this.getTagSetting(key),
                    result;
                if (tagOption !== UNSET_OPTION) {
                    return tagOption;
                }
                return (result = this.mergedOptions[key]) === undefined ? defaultval : result;
            }
        });


        $.fn.sparkline._base = createClass({
            disabled: false,

            init: function (el, values, options, width, height) {
                this.el = el;
                this.$el = $(el);
                this.values = values;
                this.options = options;
                this.width = width;
                this.height = height;
                this.currentRegion = undefined;
            },

            /**
             * Setup the canvas
             */
            initTarget: function () {
                var interactive = !this.options.get('disableInteraction');
                if (!(this.target = this.$el.simpledraw(this.width, this.height, this.options.get('composite'), interactive))) {
                    this.disabled = true;
                } else {
                    this.canvasWidth = this.target.pixelWidth;
                    this.canvasHeight = this.target.pixelHeight;
                }
            },

            /**
             * Actually render the chart to the canvas
             */
            render: function () {
                if (this.disabled) {
                    this.el.innerHTML = '';
                    return false;
                }
                return true;
            },

            /**
             * Return a region id for a given x/y co-ordinate
             */
            getRegion: function (x, y) {
            },

            /**
             * Highlight an item based on the moused-over x,y co-ordinate
             */
            setRegionHighlight: function (el, x, y) {
                var currentRegion = this.currentRegion,
                    highlightEnabled = !this.options.get('disableHighlight'),
                    newRegion;
                if (x > this.canvasWidth || y > this.canvasHeight || x < 0 || y < 0) {
                    return null;
                }
                newRegion = this.getRegion(el, x, y);
                if (currentRegion !== newRegion) {
                    if (currentRegion !== undefined && highlightEnabled) {
                        this.removeHighlight();
                    }
                    this.currentRegion = newRegion;
                    if (newRegion !== undefined && highlightEnabled) {
                        this.renderHighlight();
                    }
                    return true;
                }
                return false;
            },

            /**
             * Reset any currently highlighted item
             */
            clearRegionHighlight: function () {
                if (this.currentRegion !== undefined) {
                    this.removeHighlight();
                    this.currentRegion = undefined;
                    return true;
                }
                return false;
            },

            renderHighlight: function () {
                this.changeHighlight(true);
            },

            removeHighlight: function () {
                this.changeHighlight(false);
            },

            changeHighlight: function (highlight) {
            },

            /**
             * Fetch the HTML to display as a tooltip
             */
            getCurrentRegionTooltip: function () {
                var options = this.options,
                    header = '',
                    entries = [],
                    fields, formats, formatlen, fclass, text, i,
                    showFields, showFieldsKey, newFields, fv,
                    formatter, format, fieldlen, j;
                if (this.currentRegion === undefined) {
                    return '';
                }
                fields = this.getCurrentRegionFields();
                formatter = options.get('tooltipFormatter');
                if (formatter) {
                    return formatter(this, options, fields);
                }
                if (options.get('tooltipChartTitle')) {
                    header += '<div class="jqs jqstitle">' + options.get('tooltipChartTitle') + '</div>\n';
                }
                formats = this.options.get('tooltipFormat');
                if (!formats) {
                    return '';
                }
                if (!$.isArray(formats)) {
                    formats = [formats];
                }
                if (!$.isArray(fields)) {
                    fields = [fields];
                }
                showFields = this.options.get('tooltipFormatFieldlist');
                showFieldsKey = this.options.get('tooltipFormatFieldlistKey');
                if (showFields && showFieldsKey) {
                    // user-selected ordering of fields
                    newFields = [];
                    for (i = fields.length; i--;) {
                        fv = fields[i][showFieldsKey];
                        if ((j = $.inArray(fv, showFields)) != -1) {
                            newFields[j] = fields[i];
                        }
                    }
                    fields = newFields;
                }
                formatlen = formats.length;
                fieldlen = fields.length;
                for (i = 0; i < formatlen; i++) {
                    format = formats[i];
                    if (typeof format === 'string') {
                        format = new SPFormat(format);
                    }
                    fclass = format.fclass || 'jqsfield';
                    for (j = 0; j < fieldlen; j++) {
                        if (!fields[j].isNull || !options.get('tooltipSkipNull')) {
                            $.extend(fields[j], {
                                prefix: options.get('tooltipPrefix'),
                                suffix: options.get('tooltipSuffix')
                            });
                            text = format.render(fields[j], options.get('tooltipValueLookups'), options);
                            entries.push('<div class="' + fclass + '">' + text + '</div>');
                        }
                    }
                }
                if (entries.length) {
                    return header + entries.join('\n');
                }
                return '';
            },

            getCurrentRegionFields: function () {
            },

            calcHighlightColor: function (color, options) {
                var highlightColor = options.get('highlightColor'),
                    lighten = options.get('highlightLighten'),
                    parse, mult, rgbnew, i;
                if (highlightColor) {
                    return highlightColor;
                }
                if (lighten) {
                    // extract RGB values
                    parse = /^#([0-9a-f])([0-9a-f])([0-9a-f])$/i.exec(color) || /^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i.exec(color);
                    if (parse) {
                        rgbnew = [];
                        mult = color.length === 4 ? 16 : 1;
                        for (i = 0; i < 3; i++) {
                            rgbnew[i] = clipval(Math.round(parseInt(parse[i + 1], 16) * mult * lighten), 0, 255);
                        }
                        return 'rgb(' + rgbnew.join(',') + ')';
                    }

                }
                return color;
            }

        });

        barHighlightMixin = {
            changeHighlight: function (highlight) {
                var currentRegion = this.currentRegion,
                    target = this.target,
                    shapeids = this.regionShapes[currentRegion],
                    newShapes;
                // will be null if the region value was null
                if (shapeids) {
                    newShapes = this.renderRegion(currentRegion, highlight);
                    if ($.isArray(newShapes) || $.isArray(shapeids)) {
                        target.replaceWithShapes(shapeids, newShapes);
                        this.regionShapes[currentRegion] = $.map(newShapes, function (newShape) {
                            return newShape.id;
                        });
                    } else {
                        target.replaceWithShape(shapeids, newShapes);
                        this.regionShapes[currentRegion] = newShapes.id;
                    }
                }
            },

            render: function () {
                var values = this.values,
                    target = this.target,
                    regionShapes = this.regionShapes,
                    shapes, ids, i, j;

                if (!this.cls._super.render.call(this)) {
                    return;
                }
                for (i = values.length; i--;) {
                    shapes = this.renderRegion(i);
                    if (shapes) {
                        if ($.isArray(shapes)) {
                            ids = [];
                            for (j = shapes.length; j--;) {
                                shapes[j].append();
                                ids.push(shapes[j].id);
                            }
                            regionShapes[i] = ids;
                        } else {
                            shapes.append();
                            regionShapes[i] = shapes.id; // store just the shapeid
                        }
                    } else {
                        // null value
                        regionShapes[i] = null;
                    }
                }
                target.render();
            }
        };

        /**
         * Line charts
         */
        $.fn.sparkline.line = line = createClass($.fn.sparkline._base, {
            type: 'line',

            init: function (el, values, options, width, height) {
                line._super.init.call(this, el, values, options, width, height);
                this.vertices = [];
                this.regionMap = [];
                this.xvalues = [];
                this.yvalues = [];
                this.yminmax = [];
                this.hightlightSpotId = null;
                this.lastShapeId = null;
                this.initTarget();
            },

            getRegion: function (el, x, y) {
                var i,
                    regionMap = this.regionMap; // maps regions to value positions
                for (i = regionMap.length; i--;) {
                    if (regionMap[i] !== null && x >= regionMap[i][0] && x <= regionMap[i][1]) {
                        return regionMap[i][2];
                    }
                }
                return undefined;
            },

            getCurrentRegionFields: function () {
                var currentRegion = this.currentRegion;
                return {
                    isNull: this.yvalues[currentRegion] === null,
                    x: this.xvalues[currentRegion],
                    y: this.yvalues[currentRegion],
                    color: this.options.get('lineColor'),
                    fillColor: this.options.get('fillColor'),
                    offset: currentRegion
                };
            },

            renderHighlight: function () {
                var currentRegion = this.currentRegion,
                    target = this.target,
                    vertex = this.vertices[currentRegion],
                    options = this.options,
                    spotRadius = options.get('spotRadius'),
                    highlightSpotColor = options.get('highlightSpotColor'),
                    highlightLineColor = options.get('highlightLineColor'),
                    highlightSpot, highlightLine;

                if (!vertex) {
                    return;
                }
                if (spotRadius && highlightSpotColor) {
                    highlightSpot = target.drawCircle(vertex[0], vertex[1],
                        spotRadius, undefined, highlightSpotColor);
                    this.highlightSpotId = highlightSpot.id;
                    target.insertAfterShape(this.lastShapeId, highlightSpot);
                }
                if (highlightLineColor) {
                    highlightLine = target.drawLine(vertex[0], this.canvasTop, vertex[0],
                        this.canvasTop + this.canvasHeight, highlightLineColor);
                    this.highlightLineId = highlightLine.id;
                    target.insertAfterShape(this.lastShapeId, highlightLine);
                }
            },

            removeHighlight: function () {
                var target = this.target;
                if (this.highlightSpotId) {
                    target.removeShapeId(this.highlightSpotId);
                    this.highlightSpotId = null;
                }
                if (this.highlightLineId) {
                    target.removeShapeId(this.highlightLineId);
                    this.highlightLineId = null;
                }
            },

            scanValues: function () {
                var values = this.values,
                    valcount = values.length,
                    xvalues = this.xvalues,
                    yvalues = this.yvalues,
                    yminmax = this.yminmax,
                    i, val, isStr, isArray, sp;
                for (i = 0; i < valcount; i++) {
                    val = values[i];
                    isStr = typeof(values[i]) === 'string';
                    isArray = typeof(values[i]) === 'object' && values[i] instanceof Array;
                    sp = isStr && values[i].split(':');
                    if (isStr && sp.length === 2) { // x:y
                        xvalues.push(Number(sp[0]));
                        yvalues.push(Number(sp[1]));
                        yminmax.push(Number(sp[1]));
                    } else if (isArray) {
                        xvalues.push(val[0]);
                        yvalues.push(val[1]);
                        yminmax.push(val[1]);
                    } else {
                        xvalues.push(i);
                        if (values[i] === null || values[i] === 'null') {
                            yvalues.push(null);
                        } else {
                            yvalues.push(Number(val));
                            yminmax.push(Number(val));
                        }
                    }
                }
                if (this.options.get('xvalues')) {
                    xvalues = this.options.get('xvalues');
                }

                this.maxy = this.maxyorg = Math.max.apply(Math, yminmax);
                this.miny = this.minyorg = Math.min.apply(Math, yminmax);

                this.maxx = Math.max.apply(Math, xvalues);
                this.minx = Math.min.apply(Math, xvalues);

                this.xvalues = xvalues;
                this.yvalues = yvalues;
                this.yminmax = yminmax;

            },

            processRangeOptions: function () {
                var options = this.options,
                    normalRangeMin = options.get('normalRangeMin'),
                    normalRangeMax = options.get('normalRangeMax');

                if (normalRangeMin !== undefined) {
                    if (normalRangeMin < this.miny) {
                        this.miny = normalRangeMin;
                    }
                    if (normalRangeMax > this.maxy) {
                        this.maxy = normalRangeMax;
                    }
                }
                if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < this.miny)) {
                    this.miny = options.get('chartRangeMin');
                }
                if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > this.maxy)) {
                    this.maxy = options.get('chartRangeMax');
                }
                if (options.get('chartRangeMinX') !== undefined && (options.get('chartRangeClipX') || options.get('chartRangeMinX') < this.minx)) {
                    this.minx = options.get('chartRangeMinX');
                }
                if (options.get('chartRangeMaxX') !== undefined && (options.get('chartRangeClipX') || options.get('chartRangeMaxX') > this.maxx)) {
                    this.maxx = options.get('chartRangeMaxX');
                }

            },

            drawNormalRange: function (canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey) {
                var normalRangeMin = this.options.get('normalRangeMin'),
                    normalRangeMax = this.options.get('normalRangeMax'),
                    ytop = canvasTop + Math.round(canvasHeight - (canvasHeight * ((normalRangeMax - this.miny) / rangey))),
                    height = Math.round((canvasHeight * (normalRangeMax - normalRangeMin)) / rangey);
                this.target.drawRect(canvasLeft, ytop, canvasWidth, height, undefined, this.options.get('normalRangeColor')).append();
            },

            render: function () {
                var options = this.options,
                    target = this.target,
                    canvasWidth = this.canvasWidth,
                    canvasHeight = this.canvasHeight,
                    vertices = this.vertices,
                    spotRadius = options.get('spotRadius'),
                    regionMap = this.regionMap,
                    rangex, rangey, yvallast,
                    canvasTop, canvasLeft,
                    vertex, path, paths, x, y, xnext, xpos, xposnext,
                    last, next, yvalcount, lineShapes, fillShapes, plen,
                    valueSpots, hlSpotsEnabled, color, xvalues, yvalues, i;

                if (!line._super.render.call(this)) {
                    return;
                }

                this.scanValues();
                this.processRangeOptions();

                xvalues = this.xvalues;
                yvalues = this.yvalues;

                if (!this.yminmax.length || this.yvalues.length < 2) {
                    // empty or all null valuess
                    return;
                }

                canvasTop = canvasLeft = 0;

                rangex = this.maxx - this.minx === 0 ? 1 : this.maxx - this.minx;
                rangey = this.maxy - this.miny === 0 ? 1 : this.maxy - this.miny;
                yvallast = this.yvalues.length - 1;

                if (spotRadius && (canvasWidth < (spotRadius * 4) || canvasHeight < (spotRadius * 4))) {
                    spotRadius = 0;
                }
                if (spotRadius) {
                    // adjust the canvas size as required so that spots will fit
                    hlSpotsEnabled = options.get('highlightSpotColor') && !options.get('disableInteraction');
                    if (hlSpotsEnabled || options.get('minSpotColor') || (options.get('spotColor') && yvalues[yvallast] === this.miny)) {
                        canvasHeight -= Math.ceil(spotRadius);
                    }
                    if (hlSpotsEnabled || options.get('maxSpotColor') || (options.get('spotColor') && yvalues[yvallast] === this.maxy)) {
                        canvasHeight -= Math.ceil(spotRadius);
                        canvasTop += Math.ceil(spotRadius);
                    }
                    if (hlSpotsEnabled ||
                        ((options.get('minSpotColor') || options.get('maxSpotColor')) && (yvalues[0] === this.miny || yvalues[0] === this.maxy))) {
                        canvasLeft += Math.ceil(spotRadius);
                        canvasWidth -= Math.ceil(spotRadius);
                    }
                    if (hlSpotsEnabled || options.get('spotColor') ||
                        (options.get('minSpotColor') || options.get('maxSpotColor') &&
                        (yvalues[yvallast] === this.miny || yvalues[yvallast] === this.maxy))) {
                        canvasWidth -= Math.ceil(spotRadius);
                    }
                }


                canvasHeight--;

                if (options.get('normalRangeMin') !== undefined && !options.get('drawNormalOnTop')) {
                    this.drawNormalRange(canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey);
                }

                path = [];
                paths = [path];
                last = next = null;
                yvalcount = yvalues.length;
                for (i = 0; i < yvalcount; i++) {
                    x = xvalues[i];
                    xnext = xvalues[i + 1];
                    y = yvalues[i];
                    xpos = canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex));
                    xposnext = i < yvalcount - 1 ? canvasLeft + Math.round((xnext - this.minx) * (canvasWidth / rangex)) : canvasWidth;
                    next = xpos + ((xposnext - xpos) / 2);
                    regionMap[i] = [last || 0, next, i];
                    last = next;
                    if (y === null) {
                        if (i) {
                            if (yvalues[i - 1] !== null) {
                                path = [];
                                paths.push(path);
                            }
                            vertices.push(null);
                        }
                    } else {
                        if (y < this.miny) {
                            y = this.miny;
                        }
                        if (y > this.maxy) {
                            y = this.maxy;
                        }
                        if (!path.length) {
                            // previous value was null
                            path.push([xpos, canvasTop + canvasHeight]);
                        }
                        vertex = [xpos, canvasTop + Math.round(canvasHeight - (canvasHeight * ((y - this.miny) / rangey)))];
                        path.push(vertex);
                        vertices.push(vertex);
                    }
                }

                lineShapes = [];
                fillShapes = [];
                plen = paths.length;
                for (i = 0; i < plen; i++) {
                    path = paths[i];
                    if (path.length) {
                        if (options.get('fillColor')) {
                            path.push([path[path.length - 1][0], (canvasTop + canvasHeight)]);
                            fillShapes.push(path.slice(0));
                            path.pop();
                        }
                        // if there's only a single point in this path, then we want to display it
                        // as a vertical line which means we keep path[0]  as is
                        if (path.length > 2) {
                            // else we want the first value
                            path[0] = [path[0][0], path[1][1]];
                        }
                        lineShapes.push(path);
                    }
                }

                // draw the fill first, then optionally the normal range, then the line on top of that
                plen = fillShapes.length;
                for (i = 0; i < plen; i++) {
                    target.drawShape(fillShapes[i],
                        options.get('fillColor'), options.get('fillColor')).append();
                }

                if (options.get('normalRangeMin') !== undefined && options.get('drawNormalOnTop')) {
                    this.drawNormalRange(canvasLeft, canvasTop, canvasHeight, canvasWidth, rangey);
                }

                plen = lineShapes.length;
                for (i = 0; i < plen; i++) {
                    target.drawShape(lineShapes[i], options.get('lineColor'), undefined,
                        options.get('lineWidth')).append();
                }

                if (spotRadius && options.get('valueSpots')) {
                    valueSpots = options.get('valueSpots');
                    if (valueSpots.get === undefined) {
                        valueSpots = new RangeMap(valueSpots);
                    }
                    for (i = 0; i < yvalcount; i++) {
                        color = valueSpots.get(yvalues[i]);
                        if (color) {
                            target.drawCircle(canvasLeft + Math.round((xvalues[i] - this.minx) * (canvasWidth / rangex)),
                                canvasTop + Math.round(canvasHeight - (canvasHeight * ((yvalues[i] - this.miny) / rangey))),
                                spotRadius, undefined,
                                color).append();
                        }
                    }

                }
                if (spotRadius && options.get('spotColor') && yvalues[yvallast] !== null) {
                    target.drawCircle(canvasLeft + Math.round((xvalues[xvalues.length - 1] - this.minx) * (canvasWidth / rangex)),
                        canvasTop + Math.round(canvasHeight - (canvasHeight * ((yvalues[yvallast] - this.miny) / rangey))),
                        spotRadius, undefined,
                        options.get('spotColor')).append();
                }
                if (this.maxy !== this.minyorg) {
                    if (spotRadius && options.get('minSpotColor')) {
                        x = xvalues[$.inArray(this.minyorg, yvalues)];
                        target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
                            canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.minyorg - this.miny) / rangey))),
                            spotRadius, undefined,
                            options.get('minSpotColor')).append();
                    }
                    if (spotRadius && options.get('maxSpotColor')) {
                        x = xvalues[$.inArray(this.maxyorg, yvalues)];
                        target.drawCircle(canvasLeft + Math.round((x - this.minx) * (canvasWidth / rangex)),
                            canvasTop + Math.round(canvasHeight - (canvasHeight * ((this.maxyorg - this.miny) / rangey))),
                            spotRadius, undefined,
                            options.get('maxSpotColor')).append();
                    }
                }

                this.lastShapeId = target.getLastShapeId();
                this.canvasTop = canvasTop;
                target.render();
            }
        });

        /**
         * Bar charts
         */
        $.fn.sparkline.bar = bar = createClass($.fn.sparkline._base, barHighlightMixin, {
            type: 'bar',

            init: function (el, values, options, width, height) {
                var barWidth = parseInt(options.get('barWidth'), 10),
                    barSpacing = parseInt(options.get('barSpacing'), 10),
                    chartRangeMin = options.get('chartRangeMin'),
                    chartRangeMax = options.get('chartRangeMax'),
                    chartRangeClip = options.get('chartRangeClip'),
                    stackMin = Infinity,
                    stackMax = -Infinity,
                    isStackString, groupMin, groupMax, stackRanges,
                    numValues, i, vlen, range, zeroAxis, xaxisOffset, min, max, clipMin, clipMax,
                    stacked, vlist, j, slen, svals, val, yoffset, yMaxCalc, canvasHeightEf;
                bar._super.init.call(this, el, values, options, width, height);

                // scan values to determine whether to stack bars
                for (i = 0, vlen = values.length; i < vlen; i++) {
                    val = values[i];
                    isStackString = typeof(val) === 'string' && val.indexOf(':') > -1;
                    if (isStackString || $.isArray(val)) {
                        stacked = true;
                        if (isStackString) {
                            val = values[i] = normalizeValues(val.split(':'));
                        }
                        val = remove(val, null); // min/max will treat null as zero
                        groupMin = Math.min.apply(Math, val);
                        groupMax = Math.max.apply(Math, val);
                        if (groupMin < stackMin) {
                            stackMin = groupMin;
                        }
                        if (groupMax > stackMax) {
                            stackMax = groupMax;
                        }
                    }
                }

                this.stacked = stacked;
                this.regionShapes = {};
                this.barWidth = barWidth;
                this.barSpacing = barSpacing;
                this.totalBarWidth = barWidth + barSpacing;
                this.width = width = (values.length * barWidth) + ((values.length - 1) * barSpacing);

                this.initTarget();

                if (chartRangeClip) {
                    clipMin = chartRangeMin === undefined ? -Infinity : chartRangeMin;
                    clipMax = chartRangeMax === undefined ? Infinity : chartRangeMax;
                }

                numValues = [];
                stackRanges = stacked ? [] : numValues;
                var stackTotals = [];
                var stackRangesNeg = [];
                for (i = 0, vlen = values.length; i < vlen; i++) {
                    if (stacked) {
                        vlist = values[i];
                        values[i] = svals = [];
                        stackTotals[i] = 0;
                        stackRanges[i] = stackRangesNeg[i] = 0;
                        for (j = 0, slen = vlist.length; j < slen; j++) {
                            val = svals[j] = chartRangeClip ? clipval(vlist[j], clipMin, clipMax) : vlist[j];
                            if (val !== null) {
                                if (val > 0) {
                                    stackTotals[i] += val;
                                }
                                if (stackMin < 0 && stackMax > 0) {
                                    if (val < 0) {
                                        stackRangesNeg[i] += Math.abs(val);
                                    } else {
                                        stackRanges[i] += val;
                                    }
                                } else {
                                    stackRanges[i] += Math.abs(val - (val < 0 ? stackMax : stackMin));
                                }
                                numValues.push(val);
                            }
                        }
                    } else {
                        val = chartRangeClip ? clipval(values[i], clipMin, clipMax) : values[i];
                        val = values[i] = normalizeValue(val);
                        if (val !== null) {
                            numValues.push(val);
                        }
                    }
                }
                this.max = max = Math.max.apply(Math, numValues);
                this.min = min = Math.min.apply(Math, numValues);
                this.stackMax = stackMax = stacked ? Math.max.apply(Math, stackTotals) : max;
                this.stackMin = stackMin = stacked ? Math.min.apply(Math, numValues) : min;

                if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < min)) {
                    min = options.get('chartRangeMin');
                }
                if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > max)) {
                    max = options.get('chartRangeMax');
                }

                this.zeroAxis = zeroAxis = options.get('zeroAxis', true);
                if (min <= 0 && max >= 0 && zeroAxis) {
                    xaxisOffset = 0;
                } else if (zeroAxis == false) {
                    xaxisOffset = min;
                } else if (min > 0) {
                    xaxisOffset = min;
                } else {
                    xaxisOffset = max;
                }
                this.xaxisOffset = xaxisOffset;

                range = stacked ? (Math.max.apply(Math, stackRanges) + Math.max.apply(Math, stackRangesNeg)) : max - min;

                // as we plot zero/min values a single pixel line, we add a pixel to all other
                // values - Reduce the effective canvas size to suit
                this.canvasHeightEf = (zeroAxis && min < 0) ? this.canvasHeight - 2 : this.canvasHeight - 1;

                if (min < xaxisOffset) {
                    yMaxCalc = (stacked && max >= 0) ? stackMax : max;
                    yoffset = (yMaxCalc - xaxisOffset) / range * this.canvasHeight;
                    if (yoffset !== Math.ceil(yoffset)) {
                        this.canvasHeightEf -= 2;
                        yoffset = Math.ceil(yoffset);
                    }
                } else {
                    yoffset = this.canvasHeight;
                }
                this.yoffset = yoffset;

                if ($.isArray(options.get('colorMap'))) {
                    this.colorMapByIndex = options.get('colorMap');
                    this.colorMapByValue = null;
                } else {
                    this.colorMapByIndex = null;
                    this.colorMapByValue = options.get('colorMap');
                    if (this.colorMapByValue && this.colorMapByValue.get === undefined) {
                        this.colorMapByValue = new RangeMap(this.colorMapByValue);
                    }
                }

                this.range = range;
            },

            getRegion: function (el, x, y) {
                var result = Math.floor(x / this.totalBarWidth);
                return (result < 0 || result >= this.values.length) ? undefined : result;
            },

            getCurrentRegionFields: function () {
                var currentRegion = this.currentRegion,
                    values = ensureArray(this.values[currentRegion]),
                    result = [],
                    value, i;
                for (i = values.length; i--;) {
                    value = values[i];
                    result.push({
                        isNull: value === null,
                        value: value,
                        color: this.calcColor(i, value, currentRegion),
                        offset: currentRegion
                    });
                }
                return result;
            },

            calcColor: function (stacknum, value, valuenum) {
                var colorMapByIndex = this.colorMapByIndex,
                    colorMapByValue = this.colorMapByValue,
                    options = this.options,
                    color, newColor;
                if (this.stacked) {
                    color = options.get('stackedBarColor');
                } else {
                    color = (value < 0) ? options.get('negBarColor') : options.get('barColor');
                }
                if (value === 0 && options.get('zeroColor') !== undefined) {
                    color = options.get('zeroColor');
                }
                if (colorMapByValue && (newColor = colorMapByValue.get(value))) {
                    color = newColor;
                } else if (colorMapByIndex && colorMapByIndex.length > valuenum) {
                    color = colorMapByIndex[valuenum];
                }
                return $.isArray(color) ? color[stacknum % color.length] : color;
            },

            /**
             * Render bar(s) for a region
             */
            renderRegion: function (valuenum, highlight) {
                var vals = this.values[valuenum],
                    options = this.options,
                    xaxisOffset = this.xaxisOffset,
                    result = [],
                    range = this.range,
                    stacked = this.stacked,
                    target = this.target,
                    x = valuenum * this.totalBarWidth,
                    canvasHeightEf = this.canvasHeightEf,
                    yoffset = this.yoffset,
                    y, height, color, isNull, yoffsetNeg, i, valcount, val, minPlotted, allMin;

                vals = $.isArray(vals) ? vals : [vals];
                valcount = vals.length;
                val = vals[0];
                isNull = all(null, vals);
                allMin = all(xaxisOffset, vals, true);

                if (isNull) {
                    if (options.get('nullColor')) {
                        color = highlight ? options.get('nullColor') : this.calcHighlightColor(options.get('nullColor'), options);
                        y = (yoffset > 0) ? yoffset - 1 : yoffset;
                        return target.drawRect(x, y, this.barWidth - 1, 0, color, color);
                    } else {
                        return undefined;
                    }
                }
                yoffsetNeg = yoffset;
                for (i = 0; i < valcount; i++) {
                    val = vals[i];

                    if (stacked && val === xaxisOffset) {
                        if (!allMin || minPlotted) {
                            continue;
                        }
                        minPlotted = true;
                    }

                    if (range > 0) {
                        height = Math.floor(canvasHeightEf * ((Math.abs(val - xaxisOffset) / range))) + 1;
                    } else {
                        height = 1;
                    }
                    if (val < xaxisOffset || (val === xaxisOffset && yoffset === 0)) {
                        y = yoffsetNeg;
                        yoffsetNeg += height;
                    } else {
                        y = yoffset - height;
                        yoffset -= height;
                    }
                    color = this.calcColor(i, val, valuenum);
                    if (highlight) {
                        color = this.calcHighlightColor(color, options);
                    }
                    result.push(target.drawRect(x, y, this.barWidth - 1, height - 1, color, color));
                }
                if (result.length === 1) {
                    return result[0];
                }
                return result;
            }
        });

        /**
         * Tristate charts
         */
        $.fn.sparkline.tristate = tristate = createClass($.fn.sparkline._base, barHighlightMixin, {
            type: 'tristate',

            init: function (el, values, options, width, height) {
                var barWidth = parseInt(options.get('barWidth'), 10),
                    barSpacing = parseInt(options.get('barSpacing'), 10);
                tristate._super.init.call(this, el, values, options, width, height);

                this.regionShapes = {};
                this.barWidth = barWidth;
                this.barSpacing = barSpacing;
                this.totalBarWidth = barWidth + barSpacing;
                this.values = $.map(values, Number);
                this.width = width = (values.length * barWidth) + ((values.length - 1) * barSpacing);

                if ($.isArray(options.get('colorMap'))) {
                    this.colorMapByIndex = options.get('colorMap');
                    this.colorMapByValue = null;
                } else {
                    this.colorMapByIndex = null;
                    this.colorMapByValue = options.get('colorMap');
                    if (this.colorMapByValue && this.colorMapByValue.get === undefined) {
                        this.colorMapByValue = new RangeMap(this.colorMapByValue);
                    }
                }
                this.initTarget();
            },

            getRegion: function (el, x, y) {
                return Math.floor(x / this.totalBarWidth);
            },

            getCurrentRegionFields: function () {
                var currentRegion = this.currentRegion;
                return {
                    isNull: this.values[currentRegion] === undefined,
                    value: this.values[currentRegion],
                    color: this.calcColor(this.values[currentRegion], currentRegion),
                    offset: currentRegion
                };
            },

            calcColor: function (value, valuenum) {
                var values = this.values,
                    options = this.options,
                    colorMapByIndex = this.colorMapByIndex,
                    colorMapByValue = this.colorMapByValue,
                    color, newColor;

                if (colorMapByValue && (newColor = colorMapByValue.get(value))) {
                    color = newColor;
                } else if (colorMapByIndex && colorMapByIndex.length > valuenum) {
                    color = colorMapByIndex[valuenum];
                } else if (values[valuenum] < 0) {
                    color = options.get('negBarColor');
                } else if (values[valuenum] > 0) {
                    color = options.get('posBarColor');
                } else {
                    color = options.get('zeroBarColor');
                }
                return color;
            },

            renderRegion: function (valuenum, highlight) {
                var values = this.values,
                    options = this.options,
                    target = this.target,
                    canvasHeight, height, halfHeight,
                    x, y, color;

                canvasHeight = target.pixelHeight;
                halfHeight = Math.round(canvasHeight / 2);

                x = valuenum * this.totalBarWidth;
                if (values[valuenum] < 0) {
                    y = halfHeight;
                    height = halfHeight - 1;
                } else if (values[valuenum] > 0) {
                    y = 0;
                    height = halfHeight - 1;
                } else {
                    y = halfHeight - 1;
                    height = 2;
                }
                color = this.calcColor(values[valuenum], valuenum);
                if (color === null) {
                    return;
                }
                if (highlight) {
                    color = this.calcHighlightColor(color, options);
                }
                return target.drawRect(x, y, this.barWidth - 1, height - 1, color, color);
            }
        });

        /**
         * Discrete charts
         */
        $.fn.sparkline.discrete = discrete = createClass($.fn.sparkline._base, barHighlightMixin, {
            type: 'discrete',

            init: function (el, values, options, width, height) {
                discrete._super.init.call(this, el, values, options, width, height);

                this.regionShapes = {};
                this.values = values = $.map(values, Number);
                this.min = Math.min.apply(Math, values);
                this.max = Math.max.apply(Math, values);
                this.range = this.max - this.min;
                this.width = width = options.get('width') === 'auto' ? values.length * 2 : this.width;
                this.interval = Math.floor(width / values.length);
                this.itemWidth = width / values.length;
                if (options.get('chartRangeMin') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMin') < this.min)) {
                    this.min = options.get('chartRangeMin');
                }
                if (options.get('chartRangeMax') !== undefined && (options.get('chartRangeClip') || options.get('chartRangeMax') > this.max)) {
                    this.max = options.get('chartRangeMax');
                }
                this.initTarget();
                if (this.target) {
                    this.lineHeight = options.get('lineHeight') === 'auto' ? Math.round(this.canvasHeight * 0.3) : options.get('lineHeight');
                }
            },

            getRegion: function (el, x, y) {
                return Math.floor(x / this.itemWidth);
            },

            getCurrentRegionFields: function () {
                var currentRegion = this.currentRegion;
                return {
                    isNull: this.values[currentRegion] === undefined,
                    value: this.values[currentRegion],
                    offset: currentRegion
                };
            },

            renderRegion: function (valuenum, highlight) {
                var values = this.values,
                    options = this.options,
                    min = this.min,
                    max = this.max,
                    range = this.range,
                    interval = this.interval,
                    target = this.target,
                    canvasHeight = this.canvasHeight,
                    lineHeight = this.lineHeight,
                    pheight = canvasHeight - lineHeight,
                    ytop, val, color, x;

                val = clipval(values[valuenum], min, max);
                x = valuenum * interval;
                ytop = Math.round(pheight - pheight * ((val - min) / range));
                color = (options.get('thresholdColor') && val < options.get('thresholdValue')) ? options.get('thresholdColor') : options.get('lineColor');
                if (highlight) {
                    color = this.calcHighlightColor(color, options);
                }
                return target.drawLine(x, ytop, x, ytop + lineHeight, color);
            }
        });

        /**
         * Bullet charts
         */
        $.fn.sparkline.bullet = bullet = createClass($.fn.sparkline._base, {
            type: 'bullet',

            init: function (el, values, options, width, height) {
                var min, max, vals;
                bullet._super.init.call(this, el, values, options, width, height);

                // values: target, performance, range1, range2, range3
                this.values = values = normalizeValues(values);
                // target or performance could be null
                vals = values.slice();
                vals[0] = vals[0] === null ? vals[2] : vals[0];
                vals[1] = values[1] === null ? vals[2] : vals[1];
                min = Math.min.apply(Math, values);
                max = Math.max.apply(Math, values);
                if (options.get('base') === undefined) {
                    min = min < 0 ? min : 0;
                } else {
                    min = options.get('base');
                }
                this.min = min;
                this.max = max;
                this.range = max - min;
                this.shapes = {};
                this.valueShapes = {};
                this.regiondata = {};
                this.width = width = options.get('width') === 'auto' ? '4.0em' : width;
                this.target = this.$el.simpledraw(width, height, options.get('composite'));
                if (!values.length) {
                    this.disabled = true;
                }
                this.initTarget();
            },

            getRegion: function (el, x, y) {
                var shapeid = this.target.getShapeAt(el, x, y);
                return (shapeid !== undefined && this.shapes[shapeid] !== undefined) ? this.shapes[shapeid] : undefined;
            },

            getCurrentRegionFields: function () {
                var currentRegion = this.currentRegion;
                return {
                    fieldkey: currentRegion.substr(0, 1),
                    value: this.values[currentRegion.substr(1)],
                    region: currentRegion
                };
            },

            changeHighlight: function (highlight) {
                var currentRegion = this.currentRegion,
                    shapeid = this.valueShapes[currentRegion],
                    shape;
                delete this.shapes[shapeid];
                switch (currentRegion.substr(0, 1)) {
                    case 'r':
                        shape = this.renderRange(currentRegion.substr(1), highlight);
                        break;
                    case 'p':
                        shape = this.renderPerformance(highlight);
                        break;
                    case 't':
                        shape = this.renderTarget(highlight);
                        break;
                }
                this.valueShapes[currentRegion] = shape.id;
                this.shapes[shape.id] = currentRegion;
                this.target.replaceWithShape(shapeid, shape);
            },

            renderRange: function (rn, highlight) {
                var rangeval = this.values[rn],
                    rangewidth = Math.round(this.canvasWidth * ((rangeval - this.min) / this.range)),
                    color = this.options.get('rangeColors')[rn - 2];
                if (highlight) {
                    color = this.calcHighlightColor(color, this.options);
                }
                return this.target.drawRect(0, 0, rangewidth - 1, this.canvasHeight - 1, color, color);
            },

            renderPerformance: function (highlight) {
                var perfval = this.values[1],
                    perfwidth = Math.round(this.canvasWidth * ((perfval - this.min) / this.range)),
                    color = this.options.get('performanceColor');
                if (highlight) {
                    color = this.calcHighlightColor(color, this.options);
                }
                return this.target.drawRect(0, Math.round(this.canvasHeight * 0.3), perfwidth - 1,
                    Math.round(this.canvasHeight * 0.4) - 1, color, color);
            },

            renderTarget: function (highlight) {
                var targetval = this.values[0],
                    x = Math.round(this.canvasWidth * ((targetval - this.min) / this.range) - (this.options.get('targetWidth') / 2)),
                    targettop = Math.round(this.canvasHeight * 0.10),
                    targetheight = this.canvasHeight - (targettop * 2),
                    color = this.options.get('targetColor');
                if (highlight) {
                    color = this.calcHighlightColor(color, this.options);
                }
                return this.target.drawRect(x, targettop, this.options.get('targetWidth') - 1, targetheight - 1, color, color);
            },

            render: function () {
                var vlen = this.values.length,
                    target = this.target,
                    i, shape;
                if (!bullet._super.render.call(this)) {
                    return;
                }
                for (i = 2; i < vlen; i++) {
                    shape = this.renderRange(i).append();
                    this.shapes[shape.id] = 'r' + i;
                    this.valueShapes['r' + i] = shape.id;
                }
                if (this.values[1] !== null) {
                    shape = this.renderPerformance().append();
                    this.shapes[shape.id] = 'p1';
                    this.valueShapes.p1 = shape.id;
                }
                if (this.values[0] !== null) {
                    shape = this.renderTarget().append();
                    this.shapes[shape.id] = 't0';
                    this.valueShapes.t0 = shape.id;
                }
                target.render();
            }
        });

        /**
         * Pie charts
         */
        $.fn.sparkline.pie = pie = createClass($.fn.sparkline._base, {
            type: 'pie',

            init: function (el, values, options, width, height) {
                var total = 0, i;

                pie._super.init.call(this, el, values, options, width, height);

                this.shapes = {}; // map shape ids to value offsets
                this.valueShapes = {}; // maps value offsets to shape ids
                this.values = values = $.map(values, Number);

                if (options.get('width') === 'auto') {
                    this.width = this.height;
                }

                if (values.length > 0) {
                    for (i = values.length; i--;) {
                        total += values[i];
                    }
                }
                this.total = total;
                this.initTarget();
                this.radius = Math.floor(Math.min(this.canvasWidth, this.canvasHeight) / 2);
            },

            getRegion: function (el, x, y) {
                var shapeid = this.target.getShapeAt(el, x, y);
                return (shapeid !== undefined && this.shapes[shapeid] !== undefined) ? this.shapes[shapeid] : undefined;
            },

            getCurrentRegionFields: function () {
                var currentRegion = this.currentRegion;
                return {
                    isNull: this.values[currentRegion] === undefined,
                    value: this.values[currentRegion],
                    percent: this.values[currentRegion] / this.total * 100,
                    color: this.options.get('sliceColors')[currentRegion % this.options.get('sliceColors').length],
                    offset: currentRegion
                };
            },

            changeHighlight: function (highlight) {
                var currentRegion = this.currentRegion,
                    newslice = this.renderSlice(currentRegion, highlight),
                    shapeid = this.valueShapes[currentRegion];
                delete this.shapes[shapeid];
                this.target.replaceWithShape(shapeid, newslice);
                this.valueShapes[currentRegion] = newslice.id;
                this.shapes[newslice.id] = currentRegion;
            },

            renderSlice: function (valuenum, highlight) {
                var target = this.target,
                    options = this.options,
                    radius = this.radius,
                    borderWidth = options.get('borderWidth'),
                    offset = options.get('offset'),
                    circle = 2 * Math.PI,
                    values = this.values,
                    total = this.total,
                    next = offset ? (2 * Math.PI) * (offset / 360) : 0,
                    start, end, i, vlen, color;

                vlen = values.length;
                for (i = 0; i < vlen; i++) {
                    start = next;
                    end = next;
                    if (total > 0) {  // avoid divide by zero
                        end = next + (circle * (values[i] / total));
                    }
                    if (valuenum === i) {
                        color = options.get('sliceColors')[i % options.get('sliceColors').length];
                        if (highlight) {
                            color = this.calcHighlightColor(color, options);
                        }

                        return target.drawPieSlice(radius, radius, radius - borderWidth, start, end, undefined, color);
                    }
                    next = end;
                }
            },

            render: function () {
                var target = this.target,
                    values = this.values,
                    options = this.options,
                    radius = this.radius,
                    borderWidth = options.get('borderWidth'),
                    shape, i;

                if (!pie._super.render.call(this)) {
                    return;
                }
                if (borderWidth) {
                    target.drawCircle(radius, radius, Math.floor(radius - (borderWidth / 2)),
                        options.get('borderColor'), undefined, borderWidth).append();
                }
                for (i = values.length; i--;) {
                    if (values[i]) { // don't render zero values
                        shape = this.renderSlice(i).append();
                        this.valueShapes[i] = shape.id; // store just the shapeid
                        this.shapes[shape.id] = i;
                    }
                }
                target.render();
            }
        });

        /**
         * Box plots
         */
        $.fn.sparkline.box = box = createClass($.fn.sparkline._base, {
            type: 'box',

            init: function (el, values, options, width, height) {
                box._super.init.call(this, el, values, options, width, height);
                this.values = $.map(values, Number);
                this.width = options.get('width') === 'auto' ? '4.0em' : width;
                this.initTarget();
                if (!this.values.length) {
                    this.disabled = 1;
                }
            },

            /**
             * Simulate a single region
             */
            getRegion: function () {
                return 1;
            },

            getCurrentRegionFields: function () {
                var result = [
                    {field: 'lq', value: this.quartiles[0]},
                    {field: 'med', value: this.quartiles[1]},
                    {field: 'uq', value: this.quartiles[2]}
                ];
                if (this.loutlier !== undefined) {
                    result.push({field: 'lo', value: this.loutlier});
                }
                if (this.routlier !== undefined) {
                    result.push({field: 'ro', value: this.routlier});
                }
                if (this.lwhisker !== undefined) {
                    result.push({field: 'lw', value: this.lwhisker});
                }
                if (this.rwhisker !== undefined) {
                    result.push({field: 'rw', value: this.rwhisker});
                }
                return result;
            },

            render: function () {
                var target = this.target,
                    values = this.values,
                    vlen = values.length,
                    options = this.options,
                    canvasWidth = this.canvasWidth,
                    canvasHeight = this.canvasHeight,
                    minValue = options.get('chartRangeMin') === undefined ? Math.min.apply(Math, values) : options.get('chartRangeMin'),
                    maxValue = options.get('chartRangeMax') === undefined ? Math.max.apply(Math, values) : options.get('chartRangeMax'),
                    canvasLeft = 0,
                    lwhisker, loutlier, iqr, q1, q2, q3, rwhisker, routlier, i,
                    size, unitSize;

                if (!box._super.render.call(this)) {
                    return;
                }

                if (options.get('raw')) {
                    if (options.get('showOutliers') && values.length > 5) {
                        loutlier = values[0];
                        lwhisker = values[1];
                        q1 = values[2];
                        q2 = values[3];
                        q3 = values[4];
                        rwhisker = values[5];
                        routlier = values[6];
                    } else {
                        lwhisker = values[0];
                        q1 = values[1];
                        q2 = values[2];
                        q3 = values[3];
                        rwhisker = values[4];
                    }
                } else {
                    values.sort(function (a, b) {
                        return a - b;
                    });
                    q1 = quartile(values, 1);
                    q2 = quartile(values, 2);
                    q3 = quartile(values, 3);
                    iqr = q3 - q1;
                    if (options.get('showOutliers')) {
                        lwhisker = rwhisker = undefined;
                        for (i = 0; i < vlen; i++) {
                            if (lwhisker === undefined && values[i] > q1 - (iqr * options.get('outlierIQR'))) {
                                lwhisker = values[i];
                            }
                            if (values[i] < q3 + (iqr * options.get('outlierIQR'))) {
                                rwhisker = values[i];
                            }
                        }
                        loutlier = values[0];
                        routlier = values[vlen - 1];
                    } else {
                        lwhisker = values[0];
                        rwhisker = values[vlen - 1];
                    }
                }
                this.quartiles = [q1, q2, q3];
                this.lwhisker = lwhisker;
                this.rwhisker = rwhisker;
                this.loutlier = loutlier;
                this.routlier = routlier;

                unitSize = canvasWidth / (maxValue - minValue + 1);
                if (options.get('showOutliers')) {
                    canvasLeft = Math.ceil(options.get('spotRadius'));
                    canvasWidth -= 2 * Math.ceil(options.get('spotRadius'));
                    unitSize = canvasWidth / (maxValue - minValue + 1);
                    if (loutlier < lwhisker) {
                        target.drawCircle((loutlier - minValue) * unitSize + canvasLeft,
                            canvasHeight / 2,
                            options.get('spotRadius'),
                            options.get('outlierLineColor'),
                            options.get('outlierFillColor')).append();
                    }
                    if (routlier > rwhisker) {
                        target.drawCircle((routlier - minValue) * unitSize + canvasLeft,
                            canvasHeight / 2,
                            options.get('spotRadius'),
                            options.get('outlierLineColor'),
                            options.get('outlierFillColor')).append();
                    }
                }

                // box
                target.drawRect(
                    Math.round((q1 - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight * 0.1),
                    Math.round((q3 - q1) * unitSize),
                    Math.round(canvasHeight * 0.8),
                    options.get('boxLineColor'),
                    options.get('boxFillColor')).append();
                // left whisker
                target.drawLine(
                    Math.round((lwhisker - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight / 2),
                    Math.round((q1 - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight / 2),
                    options.get('lineColor')).append();
                target.drawLine(
                    Math.round((lwhisker - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight / 4),
                    Math.round((lwhisker - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight - canvasHeight / 4),
                    options.get('whiskerColor')).append();
                // right whisker
                target.drawLine(Math.round((rwhisker - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight / 2),
                    Math.round((q3 - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight / 2),
                    options.get('lineColor')).append();
                target.drawLine(
                    Math.round((rwhisker - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight / 4),
                    Math.round((rwhisker - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight - canvasHeight / 4),
                    options.get('whiskerColor')).append();
                // median line
                target.drawLine(
                    Math.round((q2 - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight * 0.1),
                    Math.round((q2 - minValue) * unitSize + canvasLeft),
                    Math.round(canvasHeight * 0.9),
                    options.get('medianColor')).append();
                if (options.get('target')) {
                    size = Math.ceil(options.get('spotRadius'));
                    target.drawLine(
                        Math.round((options.get('target') - minValue) * unitSize + canvasLeft),
                        Math.round((canvasHeight / 2) - size),
                        Math.round((options.get('target') - minValue) * unitSize + canvasLeft),
                        Math.round((canvasHeight / 2) + size),
                        options.get('targetColor')).append();
                    target.drawLine(
                        Math.round((options.get('target') - minValue) * unitSize + canvasLeft - size),
                        Math.round(canvasHeight / 2),
                        Math.round((options.get('target') - minValue) * unitSize + canvasLeft + size),
                        Math.round(canvasHeight / 2),
                        options.get('targetColor')).append();
                }
                target.render();
            }
        });

        // Setup a very simple "virtual canvas" to make drawing the few shapes we need easier
        // This is accessible as $(foo).simpledraw()

        VShape = createClass({
            init: function (target, id, type, args) {
                this.target = target;
                this.id = id;
                this.type = type;
                this.args = args;
            },
            append: function () {
                this.target.appendShape(this);
                return this;
            }
        });

        VCanvas_base = createClass({
            _pxregex: /(\d+)(px)?\s*$/i,

            init: function (width, height, target) {
                if (!width) {
                    return;
                }
                this.width = width;
                this.height = height;
                this.target = target;
                this.lastShapeId = null;
                if (target[0]) {
                    target = target[0];
                }
                $.data(target, '_jqs_vcanvas', this);
            },

            drawLine: function (x1, y1, x2, y2, lineColor, lineWidth) {
                return this.drawShape([[x1, y1], [x2, y2]], lineColor, lineWidth);
            },

            drawShape: function (path, lineColor, fillColor, lineWidth) {
                return this._genShape('Shape', [path, lineColor, fillColor, lineWidth]);
            },

            drawCircle: function (x, y, radius, lineColor, fillColor, lineWidth) {
                return this._genShape('Circle', [x, y, radius, lineColor, fillColor, lineWidth]);
            },

            drawPieSlice: function (x, y, radius, startAngle, endAngle, lineColor, fillColor) {
                return this._genShape('PieSlice', [x, y, radius, startAngle, endAngle, lineColor, fillColor]);
            },

            drawRect: function (x, y, width, height, lineColor, fillColor) {
                return this._genShape('Rect', [x, y, width, height, lineColor, fillColor]);
            },

            getElement: function () {
                return this.canvas;
            },

            /**
             * Return the most recently inserted shape id
             */
            getLastShapeId: function () {
                return this.lastShapeId;
            },

            /**
             * Clear and reset the canvas
             */
            reset: function () {
                alert('reset not implemented');
            },

            _insert: function (el, target) {
                $(target).html(el);
            },

            /**
             * Calculate the pixel dimensions of the canvas
             */
            _calculatePixelDims: function (width, height, canvas) {
                // XXX This should probably be a configurable option
                var match;
                match = this._pxregex.exec(height);
                if (match) {
                    this.pixelHeight = match[1];
                } else {
                    this.pixelHeight = $(canvas).height();
                }
                match = this._pxregex.exec(width);
                if (match) {
                    this.pixelWidth = match[1];
                } else {
                    this.pixelWidth = $(canvas).width();
                }
            },

            /**
             * Generate a shape object and id for later rendering
             */
            _genShape: function (shapetype, shapeargs) {
                var id = shapeCount++;
                shapeargs.unshift(id);
                return new VShape(this, id, shapetype, shapeargs);
            },

            /**
             * Add a shape to the end of the render queue
             */
            appendShape: function (shape) {
                alert('appendShape not implemented');
            },

            /**
             * Replace one shape with another
             */
            replaceWithShape: function (shapeid, shape) {
                alert('replaceWithShape not implemented');
            },

            /**
             * Insert one shape after another in the render queue
             */
            insertAfterShape: function (shapeid, shape) {
                alert('insertAfterShape not implemented');
            },

            /**
             * Remove a shape from the queue
             */
            removeShapeId: function (shapeid) {
                alert('removeShapeId not implemented');
            },

            /**
             * Find a shape at the specified x/y co-ordinates
             */
            getShapeAt: function (el, x, y) {
                alert('getShapeAt not implemented');
            },

            /**
             * Render all queued shapes onto the canvas
             */
            render: function () {
                alert('render not implemented');
            }
        });

        VCanvas_canvas = createClass(VCanvas_base, {
            init: function (width, height, target, interact) {
                VCanvas_canvas._super.init.call(this, width, height, target);
                this.canvas = document.createElement('canvas');
                if (target[0]) {
                    target = target[0];
                }
                $.data(target, '_jqs_vcanvas', this);
                $(this.canvas).css({display: 'inline-block', width: width, height: height, verticalAlign: 'top'});
                this._insert(this.canvas, target);
                this._calculatePixelDims(width, height, this.canvas);
                this.canvas.width = this.pixelWidth;
                this.canvas.height = this.pixelHeight;
                this.interact = interact;
                this.shapes = {};
                this.shapeseq = [];
                this.currentTargetShapeId = undefined;
                $(this.canvas).css({width: this.pixelWidth, height: this.pixelHeight});
            },

            _getContext: function (lineColor, fillColor, lineWidth) {
                var context = this.canvas.getContext('2d');
                if (lineColor !== undefined) {
                    context.strokeStyle = lineColor;
                }
                context.lineWidth = lineWidth === undefined ? 1 : lineWidth;
                if (fillColor !== undefined) {
                    context.fillStyle = fillColor;
                }
                return context;
            },

            reset: function () {
                var context = this._getContext();
                context.clearRect(0, 0, this.pixelWidth, this.pixelHeight);
                this.shapes = {};
                this.shapeseq = [];
                this.currentTargetShapeId = undefined;
            },

            _drawShape: function (shapeid, path, lineColor, fillColor, lineWidth) {
                var context = this._getContext(lineColor, fillColor, lineWidth),
                    i, plen;
                context.beginPath();
                context.moveTo(path[0][0] + 0.5, path[0][1] + 0.5);
                for (i = 1, plen = path.length; i < plen; i++) {
                    context.lineTo(path[i][0] + 0.5, path[i][1] + 0.5); // the 0.5 offset gives us crisp pixel-width lines
                }
                if (lineColor !== undefined) {
                    context.stroke();
                }
                if (fillColor !== undefined) {
                    context.fill();
                }
                if (this.targetX !== undefined && this.targetY !== undefined &&
                    context.isPointInPath(this.targetX, this.targetY)) {
                    this.currentTargetShapeId = shapeid;
                }
            },

            _drawCircle: function (shapeid, x, y, radius, lineColor, fillColor, lineWidth) {
                var context = this._getContext(lineColor, fillColor, lineWidth);
                context.beginPath();
                context.arc(x, y, radius, 0, 2 * Math.PI, false);
                if (this.targetX !== undefined && this.targetY !== undefined &&
                    context.isPointInPath(this.targetX, this.targetY)) {
                    this.currentTargetShapeId = shapeid;
                }
                if (lineColor !== undefined) {
                    context.stroke();
                }
                if (fillColor !== undefined) {
                    context.fill();
                }
            },

            _drawPieSlice: function (shapeid, x, y, radius, startAngle, endAngle, lineColor, fillColor) {
                var context = this._getContext(lineColor, fillColor);
                context.beginPath();
                context.moveTo(x, y);
                context.arc(x, y, radius, startAngle, endAngle, false);
                context.lineTo(x, y);
                context.closePath();
                if (lineColor !== undefined) {
                    context.stroke();
                }
                if (fillColor) {
                    context.fill();
                }
                if (this.targetX !== undefined && this.targetY !== undefined &&
                    context.isPointInPath(this.targetX, this.targetY)) {
                    this.currentTargetShapeId = shapeid;
                }
            },

            _drawRect: function (shapeid, x, y, width, height, lineColor, fillColor) {
                return this._drawShape(shapeid, [[x, y], [x + width, y], [x + width, y + height], [x, y + height], [x, y]], lineColor, fillColor);
            },

            appendShape: function (shape) {
                this.shapes[shape.id] = shape;
                this.shapeseq.push(shape.id);
                this.lastShapeId = shape.id;
                return shape.id;
            },

            replaceWithShape: function (shapeid, shape) {
                var shapeseq = this.shapeseq,
                    i;
                this.shapes[shape.id] = shape;
                for (i = shapeseq.length; i--;) {
                    if (shapeseq[i] == shapeid) {
                        shapeseq[i] = shape.id;
                    }
                }
                delete this.shapes[shapeid];
            },

            replaceWithShapes: function (shapeids, shapes) {
                var shapeseq = this.shapeseq,
                    shapemap = {},
                    sid, i, first;

                for (i = shapeids.length; i--;) {
                    shapemap[shapeids[i]] = true;
                }
                for (i = shapeseq.length; i--;) {
                    sid = shapeseq[i];
                    if (shapemap[sid]) {
                        shapeseq.splice(i, 1);
                        delete this.shapes[sid];
                        first = i;
                    }
                }
                for (i = shapes.length; i--;) {
                    shapeseq.splice(first, 0, shapes[i].id);
                    this.shapes[shapes[i].id] = shapes[i];
                }

            },

            insertAfterShape: function (shapeid, shape) {
                var shapeseq = this.shapeseq,
                    i;
                for (i = shapeseq.length; i--;) {
                    if (shapeseq[i] === shapeid) {
                        shapeseq.splice(i + 1, 0, shape.id);
                        this.shapes[shape.id] = shape;
                        return;
                    }
                }
            },

            removeShapeId: function (shapeid) {
                var shapeseq = this.shapeseq,
                    i;
                for (i = shapeseq.length; i--;) {
                    if (shapeseq[i] === shapeid) {
                        shapeseq.splice(i, 1);
                        break;
                    }
                }
                delete this.shapes[shapeid];
            },

            getShapeAt: function (el, x, y) {
                this.targetX = x;
                this.targetY = y;
                this.render();
                return this.currentTargetShapeId;
            },

            render: function () {
                var shapeseq = this.shapeseq,
                    shapes = this.shapes,
                    shapeCount = shapeseq.length,
                    context = this._getContext(),
                    shapeid, shape, i;
                context.clearRect(0, 0, this.pixelWidth, this.pixelHeight);
                for (i = 0; i < shapeCount; i++) {
                    shapeid = shapeseq[i];
                    shape = shapes[shapeid];
                    this['_draw' + shape.type].apply(this, shape.args);
                }
                if (!this.interact) {
                    // not interactive so no need to keep the shapes array
                    this.shapes = {};
                    this.shapeseq = [];
                }
            }

        });

        VCanvas_vml = createClass(VCanvas_base, {
            init: function (width, height, target) {
                var groupel;
                VCanvas_vml._super.init.call(this, width, height, target);
                if (target[0]) {
                    target = target[0];
                }
                $.data(target, '_jqs_vcanvas', this);
                this.canvas = document.createElement('span');
                $(this.canvas).css({
                    display: 'inline-block',
                    position: 'relative',
                    overflow: 'hidden',
                    width: width,
                    height: height,
                    margin: '0px',
                    padding: '0px',
                    verticalAlign: 'top'
                });
                this._insert(this.canvas, target);
                this._calculatePixelDims(width, height, this.canvas);
                this.canvas.width = this.pixelWidth;
                this.canvas.height = this.pixelHeight;
                groupel = '<v:group coordorigin="0 0" coordsize="' + this.pixelWidth + ' ' + this.pixelHeight + '"' +
                    ' style="position:absolute;top:0;left:0;width:' + this.pixelWidth + 'px;height=' + this.pixelHeight + 'px;"></v:group>';
                this.canvas.insertAdjacentHTML('beforeEnd', groupel);
                this.group = $(this.canvas).children()[0];
                this.rendered = false;
                this.prerender = '';
            },

            _drawShape: function (shapeid, path, lineColor, fillColor, lineWidth) {
                var vpath = [],
                    initial, stroke, fill, closed, vel, plen, i;
                for (i = 0, plen = path.length; i < plen; i++) {
                    vpath[i] = '' + (path[i][0]) + ',' + (path[i][1]);
                }
                initial = vpath.splice(0, 1);
                lineWidth = lineWidth === undefined ? 1 : lineWidth;
                stroke = lineColor === undefined ? ' stroked="false" ' : ' strokeWeight="' + lineWidth + 'px" strokeColor="' + lineColor + '" ';
                fill = fillColor === undefined ? ' filled="false"' : ' fillColor="' + fillColor + '" filled="true" ';
                closed = vpath[0] === vpath[vpath.length - 1] ? 'x ' : '';
                vel = '<v:shape coordorigin="0 0" coordsize="' + this.pixelWidth + ' ' + this.pixelHeight + '" ' +
                    ' id="jqsshape' + shapeid + '" ' +
                    stroke +
                    fill +
                    ' style="position:absolute;left:0px;top:0px;height:' + this.pixelHeight + 'px;width:' + this.pixelWidth + 'px;padding:0px;margin:0px;" ' +
                    ' path="m ' + initial + ' l ' + vpath.join(', ') + ' ' + closed + 'e">' +
                    ' </v:shape>';
                return vel;
            },

            _drawCircle: function (shapeid, x, y, radius, lineColor, fillColor, lineWidth) {
                var stroke, fill, vel;
                x -= radius;
                y -= radius;
                stroke = lineColor === undefined ? ' stroked="false" ' : ' strokeWeight="' + lineWidth + 'px" strokeColor="' + lineColor + '" ';
                fill = fillColor === undefined ? ' filled="false"' : ' fillColor="' + fillColor + '" filled="true" ';
                vel = '<v:oval ' +
                    ' id="jqsshape' + shapeid + '" ' +
                    stroke +
                    fill +
                    ' style="position:absolute;top:' + y + 'px; left:' + x + 'px; width:' + (radius * 2) + 'px; height:' + (radius * 2) + 'px"></v:oval>';
                return vel;

            },

            _drawPieSlice: function (shapeid, x, y, radius, startAngle, endAngle, lineColor, fillColor) {
                var vpath, startx, starty, endx, endy, stroke, fill, vel;
                if (startAngle === endAngle) {
                    return '';  // VML seems to have problem when start angle equals end angle.
                }
                if ((endAngle - startAngle) === (2 * Math.PI)) {
                    startAngle = 0.0;  // VML seems to have a problem when drawing a full circle that doesn't start 0
                    endAngle = (2 * Math.PI);
                }

                startx = x + Math.round(Math.cos(startAngle) * radius);
                starty = y + Math.round(Math.sin(startAngle) * radius);
                endx = x + Math.round(Math.cos(endAngle) * radius);
                endy = y + Math.round(Math.sin(endAngle) * radius);

                if (startx === endx && starty === endy) {
                    if ((endAngle - startAngle) < Math.PI) {
                        // Prevent very small slices from being mistaken as a whole pie
                        return '';
                    }
                    // essentially going to be the entire circle, so ignore startAngle
                    startx = endx = x + radius;
                    starty = endy = y;
                }

                if (startx === endx && starty === endy && (endAngle - startAngle) < Math.PI) {
                    return '';
                }

                vpath = [x - radius, y - radius, x + radius, y + radius, startx, starty, endx, endy];
                stroke = lineColor === undefined ? ' stroked="false" ' : ' strokeWeight="1px" strokeColor="' + lineColor + '" ';
                fill = fillColor === undefined ? ' filled="false"' : ' fillColor="' + fillColor + '" filled="true" ';
                vel = '<v:shape coordorigin="0 0" coordsize="' + this.pixelWidth + ' ' + this.pixelHeight + '" ' +
                    ' id="jqsshape' + shapeid + '" ' +
                    stroke +
                    fill +
                    ' style="position:absolute;left:0px;top:0px;height:' + this.pixelHeight + 'px;width:' + this.pixelWidth + 'px;padding:0px;margin:0px;" ' +
                    ' path="m ' + x + ',' + y + ' wa ' + vpath.join(', ') + ' x e">' +
                    ' </v:shape>';
                return vel;
            },

            _drawRect: function (shapeid, x, y, width, height, lineColor, fillColor) {
                return this._drawShape(shapeid, [[x, y], [x, y + height], [x + width, y + height], [x + width, y], [x, y]], lineColor, fillColor);
            },

            reset: function () {
                this.group.innerHTML = '';
            },

            appendShape: function (shape) {
                var vel = this['_draw' + shape.type].apply(this, shape.args);
                if (this.rendered) {
                    this.group.insertAdjacentHTML('beforeEnd', vel);
                } else {
                    this.prerender += vel;
                }
                this.lastShapeId = shape.id;
                return shape.id;
            },

            replaceWithShape: function (shapeid, shape) {
                var existing = $('#jqsshape' + shapeid),
                    vel = this['_draw' + shape.type].apply(this, shape.args);
                existing[0].outerHTML = vel;
            },

            replaceWithShapes: function (shapeids, shapes) {
                // replace the first shapeid with all the new shapes then toast the remaining old shapes
                var existing = $('#jqsshape' + shapeids[0]),
                    replace = '',
                    slen = shapes.length,
                    i;
                for (i = 0; i < slen; i++) {
                    replace += this['_draw' + shapes[i].type].apply(this, shapes[i].args);
                }
                existing[0].outerHTML = replace;
                for (i = 1; i < shapeids.length; i++) {
                    $('#jqsshape' + shapeids[i]).remove();
                }
            },

            insertAfterShape: function (shapeid, shape) {
                var existing = $('#jqsshape' + shapeid),
                    vel = this['_draw' + shape.type].apply(this, shape.args);
                existing[0].insertAdjacentHTML('afterEnd', vel);
            },

            removeShapeId: function (shapeid) {
                var existing = $('#jqsshape' + shapeid);
                this.group.removeChild(existing[0]);
            },

            getShapeAt: function (el, x, y) {
                var shapeid = el.id.substr(8);
                return shapeid;
            },

            render: function () {
                if (!this.rendered) {
                    // batch the intial render into a single repaint
                    this.group.innerHTML = this.prerender;
                    this.rendered = true;
                }
            }
        });

    }))
}(document, Math));
